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 calculate the percent of a number?

Back

To calculate the percent of a number, divide the part by the whole and multiply by 100. Formula: (Part/Whole) x 100.

Front

What is the formula to find the whole when given a part and a percent?

Back

Whole = Part / (Percent/100).

Front

If 80% of a group of 1,000 people do not know something, how many do know it?

Back

To find how many know, calculate 100% - 80% = 20%. Then, 20% of 1,000 is 200.

Front

What percent is 8 of 20?

Back

To find this, use the formula: (8/20) x 100 = 40%.

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 multiply by 100.

Front

What is the percent grade if a student scores 60 out of 75?

Back

Percent grade = (60/75) x 100 = 80%.

Front

What percent of 50 is 20?

Back

To find this, use the formula: (20/50) x 100 = 40%.

Front

If 12 is 90% of a number, how do you find that number?

Back

Use the formula: Number = 12 / (90/100) = 13.3.

Front

What does it mean if a number is 25% of another number?

Back

It means that the first number is one-fourth of the second number.