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 a/b = c/d, what is the cross-multiplication method?

Back

The cross-multiplication method states that a*d = b*c.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit.

Front

How do you find the unit rate from a ratio?

Back

To find the unit rate, divide the first quantity by the second quantity.

Front

If Nathan packs 39 boxes in 3 hours, how many boxes does he pack per hour?

Back

13 boxes per hour.

Front

If Mike reads 4 pages in 18 minutes, how long does it take him to read 1 page?

Back

4.5 minutes per page.

Front

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

Back

$0.50 per apple.

Front

If 50 apples cost $25.00, how much do 75 apples cost?

Back

$37.50.

Front

What is the formula for finding the total cost based on unit price?

Back

Total Cost = Unit Price x Quantity.