Percentage of a Number

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It represents how much of something there is out of a total of 100.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 30% of 50, calculate 50 x 0.30 = 15.

Front

What does it mean to find 40% of a total?

Back

Finding 40% of a total means calculating how much 40 out of every 100 parts of that total represents.

Front

If you have 55 jellybeans and 40% are red, how do you find the number of red jellybeans?

Back

Multiply the total number of jellybeans (55) by 0.40 (the decimal form of 40%). So, 55 x 0.40 = 22 red jellybeans.

Front

What is a discount?

Back

A discount is a reduction in the price of an item, often expressed as a percentage of the original price.

Front

How do you calculate a discount amount?

Back

To calculate a discount amount, multiply the original price by the discount percentage (in decimal form). For example, for a 40% discount on $45, calculate 45 x 0.40 = $18.

Front

What is the formula to find the total after applying a discount?

Back

The total after applying a discount can be found by subtracting the discount amount from the original price. Total = Original Price - Discount Amount.

Front

If Sarah earns $20 a day and spends 30% of her earnings, how do you find out how much she spent?

Back

Multiply her daily earnings ($20) by 0.30 (the decimal form of 30%). So, 20 x 0.30 = $6.

Front

What is the relationship between percentages and fractions?

Back

Percentages can be converted to fractions by placing the percentage over 100. For example, 25% = 25/100 = 1/4.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 25% = 25 ÷ 100 = 0.25.