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, multiply the number by the percent (in decimal form) and then divide by 100.

Front

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

Back

Total = Part / (Percent / 100)

Front

If 50 is 25% of what number, how do you find that number?

Back

Number = 50 / (25 / 100) = 200.

Front

What is 10% of 200?

Back

10% of 200 is 20.

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 increase formula?

Back

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

Front

What is the percent decrease formula?

Back

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

Front

If a shirt costs $40 and is on sale for $30, what is the percent decrease in price?

Back

Percent Decrease = ((40 - 30) / 40) * 100 = 25%.

Front

What is 75% of 80?

Back

75% of 80 is 60.