Percentages

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare proportions.

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 20% of 50, calculate 50 x 0.20 = 10.

Front

What does it mean to have a 20% discount?

Back

A 20% discount means that the price of an item is reduced by 20% of its original price.

Front

If an item costs $80 and is on sale for 25% off, how much will it cost after the discount?

Back

The discount is $20 (25% of $80), so the item will cost $60 after the discount.

Front

What is 50% of 200?

Back

100

Front

How do you convert a decimal to a percentage?

Back

To convert a decimal to a percentage, multiply the decimal by 100 and add a percent sign. For example, 0.75 becomes 75%.

Front

What is 9% of 450?

Back

40.5

Front

If a student scores 75% on a test with 20 questions, how many questions did they answer correctly?

Back

15 questions (75% of 20 is 15).

Front

What is the formula to find the percentage increase?

Back

Percentage Increase = ((New Value - Original Value) / Original Value) x 100.

Front

What is the percentage of a whole?

Back

The percentage of a whole is 100%, meaning the entire amount.