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Pearson Algebra 1 Common Core, 2011 View details

9. Percents

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Exercise 36 Page 142

Use the percent proportion.

What are we finding? A base.
b=24

Practice makes perfect

In the percent proportion, the ratio of the part a to the whole b is equal to the percent p written as a fraction. a/b=p/100 Given any two of these three variables, we can find the third one. Since we are asked of what number? we are trying to find the base. We are given the values p= 250 and a= 60, and we will solve for b.

a/b=p/100

SubstituteII

a= 60, p= 250

60/b=250/100

ReduceFrac

a/b=.a /25./.b /25.

60/b=10/4

MultEqn

LHS * b=RHS* b

60 = 10/4*(b)

MultEqn

LHS * 4=RHS* 4