Percents, Percents, Percents!!

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is denoted by the symbol '%'. For example, 50% means 50 out of 100.

Front

How do you calculate the percent change?

Back

Percent change is calculated using the formula: ((New Value - Old Value) / Old Value) x 100. It shows how much a value has increased or decreased in relation to its original value.

Front

What is a 30% of a number?

Back

To find 30% of a number, multiply the number by 0.30. For example, 30% of 20 is 20 x 0.30 = 6.

Front

If a game originally costs $60.64 and is on sale for $29.99, how do you find the percent decrease?

Back

First, find the decrease: $60.64 - $29.99 = $30.65. Then, use the percent change formula: (30.65 / 60.64) x 100 = 50.5% decrease.

Front

What does it mean if 40% of a group are boys?

Back

It means that out of the total group, 40 out of every 100 members are boys. If there are 200 children, then 40% boys means 80 boys (200 x 0.40).

Front

How do you find what number a percent is of?

Back

To find what number a percent is of, divide the part by the percent (in decimal form). For example, if 26 is 5% of a number, then the number is 26 / 0.05 = 520.

Front

What is the formula for finding the total number when given a part and a percent?

Back

The formula is: Total = Part / (Percent in decimal form). For example, if you know 6 is 30% of a total, then Total = 6 / 0.30 = 20.

Front

What is a 50% increase?

Back

A 50% increase means adding half of the original amount to itself. For example, if the original amount is 100, a 50% increase would be 100 + (100 x 0.50) = 150.

Front

How do you round a percent to the nearest whole number?

Back

To round a percent to the nearest whole number, look at the first decimal place. If it is 5 or higher, round up. If it is 4 or lower, round down.

Front

What is the difference between percent increase and percent decrease?

Back

Percent increase measures how much a value has grown compared to its original value, while percent decrease measures how much a value has shrunk.