Ratios, Rates, & Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing the relative size of one quantity to another, often expressed in the form a:b.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is 1. It expresses how much of one quantity corresponds to one unit of another quantity.

Front

How do you calculate a unit rate from a given rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity.

Front

What is the unit rate for 5 bananas for $1.95?

Back

$0.39/banana.

Front

What is the unit rate for 476 miles in 8 hours?

Back

59.5 miles/hour.

Front

What is the unit rate for $31.20 for 15 gallons of gas?

Back

$2.08/gallon.

Front

What is the unit rate for 680 calories in 6 muffins?

Back

113.3 calories/muffin.

Front

What does it mean to express a ratio in simplest form?

Back

Expressing a ratio in simplest form means reducing it to the smallest whole numbers that maintain the same relationship.

Front

If the ratio of shaded squares to unshaded squares is 5:3, how many unshaded squares are there if there are 15 shaded squares?

Back

9 unshaded squares.