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Warm up Complete the analogies: 5 is to 25 as 6 is to ___________ 7 is to 77 as 11 is to ___________ ¼ is to ½ as.25 is to ____________
The Percent Proportion Lesson 7-8
Percent Proportion Compares part of a quantity to the whole quantity, called the base, using a percent. The percent proportion is: part base percent 100 = a b p =
Percent Proportion What percent of $15 is $9? The percent is the unknown. The base always follows the word of. The part.
Percent Proportion. What percent of $15 is $9? 9 15 p 100 = Cross multiply. 15p = p = 60 So 60% of $15 is $9.
Percent Proportion What number is 30% of 150? The percent. The base always follows the word of. The part is the unknown.
Percent Proportion. What number is 30% of 150? a = Cross multiply. 100a = a = 45 So 45 is 30% of 150.
Percent Proportion 12 is 80% of what number? The part. The percent. The base is the unknown. The base always follows the word of.
Percent Proportion. 12 is 80% of what number? 12 b = Cross multiply. 80b = b = 15 So 12 is 80% of 15.
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