Proportions and Percents

Front

What is a proportion?

Back

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

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100.

Front

What is 25% of 200?

Back

50

Front

If a recipe requires 2 cups of flour and you want to make half the recipe, how much flour do you need?

Back

1 cup of flour.

Front

What is the formula to find the percent of a number?

Back

Percent of a number = (Percent/100) * Number.

Front

How do you find the total amount after tax?

Back

Total amount = Original price + (Tax rate * Original price).

Front

What is the scale factor in a map?

Back

The scale factor is the ratio of a distance on the map to the actual distance it represents.

Front

If you scored 18 out of 20 on a test, what percent did you score?

Back

90%.

Front

What is the relationship between proportions and cross-multiplication?

Back

In a proportion, cross-multiplication can be used to find an unknown value.

Front

How do you calculate the percent increase?

Back

Percent increase = ((New Value - Original Value) / Original Value) * 100.