Understanding Percentages and Quantities

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 (as a decimal). For example, to find 25% of 200, calculate 200 x 0.25 = 50.

Front

What does '30% off' mean?

Back

'30% off' means that the price is reduced by 30% of the original price. For example, if an item costs $50, a 30% discount means you save $15.

Front

If 40% of a number is 80, how do you find the whole number?

Back

To find the whole number, divide 80 by 0.40. So, 80 ÷ 0.40 = 200.

Front

What is 75% of 160?

Back

75% of 160 is calculated as 160 x 0.75 = 120.

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% becomes 0.25.

Front

What is the formula to find the sale price after a discount?

Back

The sale price can be found using the formula: Sale Price = Original Price - (Original Price x Discount Percentage).

Front

What is 15% of 60?

Back

15% of 60 is calculated as 60 x 0.15 = 9.

Front

How do you find the percentage of a total?

Back

To find the percentage of a total, divide the part by the whole and then multiply by 100. For example, if you have 50 out of 200, the percentage is (50 ÷ 200) x 100 = 25%.

Front

What does it mean if a number is increased by a percentage?

Back

If a number is increased by a percentage, you add that percentage of the number to the original number. For example, increasing 100 by 20% means adding 20 (which is 20% of 100) to 100, resulting in 120.