Writing 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 using variables?

Back

Front

What is the cross-multiplication method in proportions?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio, leading to the equation: a * d = b * c.

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.

Front

How do you simplify a ratio?

Back

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

Front

What is the relationship between ratios and proportions?

Back

Ratios can form proportions when two ratios are equivalent.

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 2:3.

Front

How do you find an unknown in a proportion?

Back

To find an unknown in a proportion, set up the proportion and use cross-multiplication to solve for the unknown.

Front

What is the simplified ratio of 10 to 15?

Back

The simplified ratio of 10 to 15 is 2:3.

Front

If a car travels 60 miles in 1 hour, what is the unit rate?

Back

The unit rate is 60 miles per hour.