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Notes 9.1B Name_________________ Example Your turn How do I use a fraction to find a percent of a number? Find 40% of 60. 1. Write the percent and whole numbers as fractions. 40% of 60 2. Multiply the fractions. Use dividing out common factors (slashing) if possible. 3 40 x 60 = 120 100 1 5 5 3. Simplify if needed. 120 = 24 5 Key Vocabulary percent (%) – a ratio with a denominator of 100 Find 20% of 40. 40 x 60 100 1 Remember: To find 10% of a number, move the decimal point 1 place left. 10% of 67.5 = 6.75 10% of 150 = 15.0 or 15 To find 1% of a number, move the decimal point 2 places left. 1% of 67.5 = 0.675 1% of 150 = 1.50