4.6 Practice

Front

What is a percentage increase?

Back

A percentage increase is a way to express how much a quantity has grown in relation to its original amount, calculated by taking the difference between the new and original amounts, dividing by the original amount, and multiplying by 100.

Front

How do you calculate a 24% increase on a number?

Back

To calculate a 24% increase on a number, multiply the number by 0.24 and then add that result to the original number.

Front

What is a percentage decrease?

Back

A percentage decrease is a way to express how much a quantity has decreased in relation to its original amount, calculated by taking the difference between the original and new amounts, dividing by the original amount, and multiplying by 100.

Front

How do you calculate a 40% decrease on a number?

Back

To calculate a 40% decrease on a number, multiply the number by 0.40 and then subtract that result from the original number.

Front

What is the formula to find the new amount after a percentage increase?

Back

New Amount = Original Amount + (Original Amount × Percentage Increase)

Front

What is the formula to find the new amount after a percentage decrease?

Back

New Amount = Original Amount - (Original Amount × Percentage Decrease)

Front

If you have 72 and increase it by 42%, what is the new amount?

Back

The new amount is 102.

Front

If you have 400 and want to increase it by 25%, what is the new amount?

Back

The new amount is 500.

Front

If you have 120 and decrease it by 20%, what is the new amount?

Back

The new amount is 96.

Front

What does it mean to round to the nearest whole number?

Back

Rounding to the nearest whole number means adjusting a decimal number to the closest whole number, either up or down.