Practice Writing Proportions

What are proportions?

Equations that state two ratios are equal.

When are two ratios proportional?

When they are equivalent to each other.

How can you keep a ratio proportional?

Multiply or divide the numerator and denominator by the same number.

Example: Multiply numerator and denominator of 4/9 by 3

Equivalent fraction = 12/27.

Why are 4/9 and 12/27 proportional?

Because both numerator and denominator changed at the same rate.

Quick tip about proportions

Equivalent ratios = proportions.