Percent Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

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 the formula for finding a percent of a number?

Back

The formula is: Percent of a number = (Percent / 100) * Number.

Front

If 25% of a number is 50, what is the number?

Back

The number is 200. (50 = 25% of Number; Number = 50 / 0.25 = 200)

Front

What does it mean if a price is discounted by 20%?

Back

It means the price is reduced by 20 out of every 100 units of the original price.

Front

How do you find the percent increase from 50 to 75?

Back

Percent Increase = ((New Value - Old Value) / Old Value) * 100 = ((75 - 50) / 50) * 100 = 50%.

Front

What is a proportion?

Back

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

Front

If 60% of a class are girls and there are 30 students, how many are girls?

Back

There are 18 girls. (60% of 30 = 0.60 * 30 = 18)

Front

What is the relationship between percent, fraction, and decimal?

Back

Percent = Fraction * 100 = Decimal * 100.

Front

How do you calculate the percent of a total?

Back

Divide the part by the total and multiply by 100.