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The Percent Proportion The Percent Proportion parts % = total 100 To solve a proportion, multiply the numbers that are diagonal, divide by the one that’s left. Clues for # placement #% goes over the 100 Of # goes on the bottom across from 100 # is goes on the top diagonal from the 100 # is #% = of # 100 Example 1 Find 25% of 66 Remember: # is #% = of # 100 Example 1 Find 25% of 66 p 25 = 66 100 25 • 66 ÷ 100 = 16.5 Example 2 16 is what percent of 48? Remember: # is #% = of # 100 Example 2 16 is what percent of 48? 16 r = 48 100 16 • 100 ÷ 48 = 33.3% Example 3 5 is 26% of what number? # is #% = of # 100 Remember: Example 3 5 is 26% of what number? 5 26 = t 100 5 • 100 ÷ 26 = 19.23 Example 4 60 is 15% of what number? Remember: # is #% = of # 100 Example 4 60 is 15% of what number? 60 15 = t 100 60 • 100 ÷ 15 = 400 Example 5 Find 13% of 80. Remember: # is #% = of # 100 Example 5 Find 13% of 80. p 13 = 80 100 13 • 80 ÷ 100 = 10.4 Example 6 9 is what percent of 15? Remember: # is #% = of # 100 Example 6 9 is what percent of 15? 9 r = 15 100 9 • 100 ÷ 15 = 60% Example 7 There are 14 girls in Mr. Adams’ 3rd hour PE class. If there are 22 students in the class, what percent are girls? Example 7 There are 14 girls in Mr. Adams’ 3rd hour PE class. If there are 22 students in the class, what percent are girls? 14 n = 22 100 22n = 1400 1400 n= 22 n = 63.3% Example 8 In a recent election, 208 of the 325 seventh graders voted in their class election. What percent of the 7th graders voted? Example 8 In a recent election, 208 of the 325 seventh graders voted in their class election. What percent of the 7th graders voted? 208 n = 325 100 64% Example 9 Ms. Sierra earns a 2% commission on every vacation package that she sells. One day, she sold vacation packages with $6,500. What was her commission?