Writing and Solving Proportions

Front

What is a proportion?

Back

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

Front

How do you write a proportion?

Back

A proportion can be written as a/b = c/d, where a, b, c, and d are numbers.

Front

What is cross-multiplication in proportions?

Back

Cross-multiplication is a method used to solve proportions by multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If 6 ounces of fruit snacks contain 45 pieces, how many pieces are in 10 ounces?

Back

75 pieces.

Front

If there are 5 ice cream cones for every 3 brownies, how many cones for 24 brownies?

Back

40 ice cream cones.

Front

What is the cost of one slice of pizza if 8 slices cost $12?

Back

$1.50 per slice.

Front

What does it mean to solve a proportion?

Back

To solve a proportion means to find the unknown value that makes the two ratios equal.

Front

What is the first step in solving a proportion?

Back

Identify the known values and set up the proportion correctly.

Front

How can you check if your solution to a proportion is correct?

Back

You can check by substituting your solution back into the original proportion to see if both sides are equal.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.