body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Glencoe Math: Course 2, Volume 1

GM

Glencoe Math: Course 2, Volume 1 View details

Mid-Chapter Check

Continue to next subchapter

Exercise 2 Page 140

The percent proportion is a proportion that sets the ratio of a part of a whole equal to the ratio of a percent out of 100.

About 14.3 %

Practice makes perfect

Let's start by recalling that the percent proportion is a proportion that sets the ratio of a part of a whole equal to the ratio of a percent out of 100. part/whole=percent/100 We want to find what percent of 84 is 12. Let n represent the percent. 12/84=n/100 Now we can solve the proportion we got for n. Let's do this by using the fact that the cross products of any proportion are equal.

12/84=n/100

Cross multiply

12* 100= 84 * n

Multiply

1200=84n

Finally, we will use the Division Property of Equality to get the value of n.

1200=84n

.LHS /84.=.RHS /84.

1200/84=84n/84

CancelCommonFac

Cancel out common factors

1200/84=84n/84

Simplify quotient

1200/84 = n

Calculate quotient

14.285714... = n

Round to 1 decimal place(s)

14.3 ≈ n

Rearrange equation

n ≈ 14.3

We got that n≈ 14.3 is a solution to the proportion. This means that 12 is about 14.3 % of 84.

Subchapter links

Vocabulary Check p.140

Skills Check and Problem Solving p.140