Exercise 12 Page 273

Let p represent the percent that 18 is of 60. Write and solve a percent proportion using p.

Proportion: 4032= p100
Solution: p=125 %

Practice makes perfect

Let p represent the percent that 40 is of 32.

We can write a percent proportion using p. 40/32=p/100 We will solve this equation using the Division Property of Equality. Let's do it!

40/32=p/100

LHS * 100=RHS* 100

40/32 * 100 =p/100 * 100

a/c* b = a* b/c

40* 100/32 =p/100 * 100

4000/32 =p/100 * 100

Calculate quotient

125=p/100 * 100

a/100* 100 = a

125 =p

Rearrange equation

p=125

We have that 40 is 125 % of 32.

1 Fractions, Decimals and Percents p.273

2 The Percent Proportion p.273

3 The Percent Equation p.274

4 Percents of Increase and Decrease p.274

5 Discounts and Markups p.275

6 Simple Interest p.275

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