Solving Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the variable.

Front

If 50 apples cost $25.00, what is the cost of 1 apple?

Back

$0.50

Front

If 75 apples cost $37.50, how much would 150 apples cost?

Back

$75.00

Front

What is the unit rate?

Back

The unit rate is the ratio of two measurements in which the second term is 1.

Front

How do you find the unit price of an item?

Back

Divide the total price by the number of items.

Front

If a pizza with 8 slices costs $12, what is the cost of 3 slices?

Back

$4.50

Front

What is the relationship between ice cream cones and brownies in the shop?

Back

For every 5 ice cream cones, there are 3 brownies sold.

Front

If 24 brownies are sold, how many ice cream cones are sold?

Back

40 ice cream cones.

Front

What does 'cross-multiplication' mean in solving proportions?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio.