Question

Use a proportion to answer the question. What percent of 30 is 27?

Short answer

The number 27 is 90% of 30.

Step-by-step solution

Step 1. Given Information.

The number is 30.

Step 2. Calculation.

Let $x$ be the number.

Write percentage as a fraction.

Therefore,

$\frac{27}{30}=\frac{x}{100}$

Multiply both sides of the equation by 100 to isolate the variable on one side of the equation.

$\begin{array}{c}\frac{27}{30}\times 100=100\times \frac{x}{100}\\ x=90\end{array}$

Step 3. Conclusion.

The number 27 is 90% of 30.