Solve Proportions and their Applications: example 6.54

Translate and solve using proportions: What percent of $72$ is $9 ?$

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

Translate and solve using proportions: What percent of $72$ is $27 ?$

How did it go?

Identify the parts of the percent proportion.
Restate as a proportion.
Set up the proportion. Let $n =$ number.
Find the cross products and set them equal.
Simplify.
Divide both sides by 72.
Simplify.
Check if the answer is reasonable.
Yes. 9 is $\frac{1}{8}$ of 72 and $\frac{1}{8}$ is 12.5%.
Write a complete sentence that answers the question.	12.5% of 72 is 9.

Identify the parts of the percent proportion.
Restate as a proportion.
Set up the proportion. Let $n =$ number.
Find the cross products and set them equal.
Simplify.
Divide both sides by 72.
Simplify.
Check if the answer is reasonable.
Yes. 9 is $\frac{1}{8}$ of 72 and $\frac{1}{8}$ is 12.5%.
Write a complete sentence that answers the question.	12.5% of 72 is 9.