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Percent of a Number Guided Practice Created by: Lindsay Perro 1 ©Lindsay Perro http://www.beyondtheworksheet.com Name ____________________________________ Date ______________________ Percent of a Number Guided Practice To determine the percent of a number you need to remember two key points: • The word “of” means Multiply! • Percents must be changed to decimals before you can multiply with them. Example: What is 70% of 150? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 70% = 0.70 Step 2: Multiply the percent (which is now a decimal) by the given number. 0.70 x 150 105 Try these: What is 40% of 120? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 40% = _________ Step 2: Multiply the percent (which is now a decimal) by the given number. _______ x _______ _______ What is 60% of 70? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 60% = _________ Step 2: Multiply the percent (which is now a decimal) by the given number. _______ x _______ _______ ©Lindsay Perro http://www.beyondtheworksheet.com On Your Own: 1. What is 30% of 250? _________________________ = ___________________ Show your work here! 2. What is 40% of 55? _________________________ = ___________________ Show your work here! 3. What is 10% of 780? _________________________ = ___________________ Show your work here! 4. What is 20% of 1,300? _________________________ = ___________________ Show your work here! 5. What is 90% of 800? _________________________ = ___________________ Show your work here! 6. The Smith family went out to dinner and received great service. They decided to leave a 20% tip for their waitress. If their dinner bill totaled $90, how much was the tip? Think: You need to find what percent of what number? Show your work! 7. Carlos just took a 40 question math test. He scored a 75%. How many questions did he get correct on his test? Show your work! 8. Marge ordered $320 worth of photographs from a website. She has to pay a 10% shipping and handling fee. How much will the fee cost her? Show your work! 9. April made $440 in tips last night waitressing. She had to give 20% of her tips to the boys who clean the tables. How much money did she have to give them? Show your work! 10. You purchase a $1,500 television. You have to pay 6% sales tax. How much will the tax be on your new television? Show your work! ©Lindsay Perro http://www.beyondtheworksheet.com Name ____________________________________ ANSWER KEY Date ______________________ Percent of a Number Guided Practice To determine the percent of a number you need to remember two key points: • The word “of” means Multiply! • Percents must be changed to decimals before you can multiply with them. Example: What is 70% of 150? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 70% = 0.70 Step 2: Multiply the percent (which is now a decimal) by the given number. 0.70 x 150 105 Try these: What is 40% of 120? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 0.40 40% = _________ Step 2: Multiply the percent (which is now a decimal) by the given number. 0.40 x _______ 120 _______ 48 _______ What is 60% of 70? Step 1: Change the percent to a decimal by moving the decimal two places to the left. Remember, the decimal in a whole number is at the end – just like a period is at the end of a sentence. 0.60 60% = _________ Step 2: Multiply the percent (which is now a decimal) by the given number. 0.60 x _______ 70 _______ 42 _______ ©Lindsay Perro http://www.beyondtheworksheet.com ANSWER KEY On Your Own: 0.30 x 250 75 1. What is 30% of 250? _________________________ = ___________________ Show your work here! 0.40 x 55 22 2. What is 40% of 55? _________________________ = ___________________ Show your work here! 0.10 x 780 78 3. What is 10% of 780? _________________________ = ___________________ Show your work here! 0.20 x 1300 260 4. What is 20% of 1,300? _________________________ = ___________________ Show your work here! 720 0.90 x 800 5. What is 90% of 800? _________________________ = ___________________ Show your work here! 6. The Smith family went out to dinner and received great service. They decided to leave a 20% tip for their waitress. If their dinner bill totaled $90, how much was the tip? Think: You need to find what percent of what number? Show your work! $18 tip 7. Carlos just took a 40 question math test. He scored a 75%. How many questions did he get correct on his test? Show your work! 30 correct 8. Marge ordered $320 worth of photographs from a website. She has to pay a 10% shipping and handling fee. How much will the fee cost her? Show your work! $32 fee 9. April made $440 in tips last night waitressing. She had to give 20% of her tips to the boys who clean the tables. How much money did she have to give them? Show your work! $88 10. You purchase a $1,500 television. You have to pay 6% sales tax. How much will the tax be on your new television? Show your work! $90 sales tax ©Lindsay Perro http://www.beyondtheworksheet.com Terms of Use © 2012 (updated 2015) Lindsay Perro. Your download includes a limited use license from Lindsay Perro. The purchaser may use the resource for personal classroom use only. The license is not transferable to another person. Other teachers are able to purchase their own license through my store. This resource is not to be used: • By an entire grade level, school or district without purchasing the proper number of licenses. 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