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Q51.

Expert-verified
Found in: Page 348

### Pre-algebra

Book edition Common Core Edition
Author(s) Ron Larson, Laurie Boswell, Timothy D. Kanold, Lee Stiff
Pages 183 pages
ISBN 9780547587776

# Evaluate the expression when $k=20$.$\left(80-k\right)%\text{of}30$

The solution of expression $\left(80-k\right)%\text{of}30$ is 18.

See the step by step solution

## Step 1. Given Information.

It is given that $k=20$.

## Step 2. Calculation.

Substitute $k$

$\begin{array}{l}\left(80-20\right)%\text{of}30\\ 60%\text{of}30\text{}\left[\text{subtract}\right]\end{array}$

Therefore, the expression is

$\begin{array}{l}\text{60% of 30}=\frac{60}{100}\cdot 30\text{}\left[\text{write percentage as a fraction}\right]\\ \text{}=0.60\cdot 30\text{}\left[\text{multiply}\right]\\ \text{}=18\text{}\left[\text{multiply}\right]\end{array}$

## Step 3. Conclusion.

The percentage $60%\text{of}30$ is 18.