Chapter 1: Q14. (page 21)

Use the percent proportion to find the following number.
What is 25% of 18?

Short Answer

Expert verified

25% of 18 is 4.5.

Step by step solution

Step 1. Definition of percent.

Percent of a number is defined as the ratio of number and 100.

Step 2. Formula Used.

The ratio of part x of some number y is equal to the percent is written as.

$\frac{x}{y} = \frac{p}{100}$

Step 3. Find the percent proportion.

Percent = 25, y = 18 and x = ?

$\frac{x}{y} = \frac{p}{100} \frac{x}{18} = \frac{25}{100} [crossmultiply] x \times 100 = 18 \times 25 100 x = 450 [dividebothsideby 50] \frac{100 x}{50} = \frac{450}{50} 2 x = 9 x = \frac{9}{2} x = 4.5$

Hence, 25% of 18 is 4.5.

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Use the percent proportion to find the following number.
What is 25% of 18?

Short Answer

Step by step solution

Step 1. Definition of percent.

Step 2. Formula Used.

Step 3. Find the percent proportion.

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Use the percent proportion to find the following number.What is 25% of 18?

Short Answer

Step by step solution

Step 1. Definition of percent.

Step 2. Formula Used.

Step 3. Find the percent proportion.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Pure Maths

Logic and Functions

Mechanics Maths

Discrete Mathematics

Decision Maths

Probability and Statistics

Study anywhere. Anytime. Across all devices.

Use the percent proportion to find the following number.
What is 25% of 18?