Proportions

Front

What is a proportion?

Back

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

Front

How do you solve for a variable in a proportion?

Back

Cross-multiply the ratios and then solve for the variable.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing the relative size of one quantity to another.

Front

How do you simplify a ratio?

Back

Divide both terms of the ratio by their greatest common divisor.

Front

What is the simplest form of the ratio 8:24?

Back

1:3

Front

If 4p = 16, what is the value of p?

Back

p = 4

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/d, then ad = bc.

Front

If Mrs. Setzer buys 3 boxes of cookies for $15, how much does one box cost?

Back

One box costs $5.

Front

If the ratio of red paint to yellow paint is 3:5, how much yellow paint is needed for 9 oz of red paint?

Back

15 oz of yellow paint.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second is the denominator.