Question

find the number that makes the ratio equivalent to 9:1.
□:9

Explanation:

Step1: Let the unknown number be x

Let the number be \( x \). The ratio is \( x:9 \).

Step2: Set up proportion equation

Equate to \( 9:1 \): \( \frac{x}{9} = \frac{9}{1} \)

Step3: Solve for x

Multiply both sides by 9: \( x = 9 \times 9 = 81 \)

Answer:

81