Percentage problems

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 find 'what percent' of a number?

Back

Finding 'what percent' of a number involves determining how much one number is in relation to another number, expressed as a percentage.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and then multiply by 100. For example, 1/4 = (1 ÷ 4) x 100 = 25%.

Front

What is 75% of 200?

Back

150

Front

If 60% of a class of 30 students passed a test, how many students passed?

Back

18 students passed (30 x 0.60 = 18).

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 formula to find the percentage decrease?

Back

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

Front

If a shirt costs $40 and is on sale for 25% off, what is the sale price?

Back

The sale price is $30 (25% of $40 is $10, so $40 - $10 = $30).

Front

What is 50% of 60?

Back

30