Percent Proportion and Percent Change

Front

What is percent decrease?

Back

Percent decrease is a measure of how much a quantity has decreased in relation to its original amount, expressed as a percentage.

Front

How do you calculate percent decrease?

Back

Percent decrease = ((Original Price - Sale Price) / Original Price) x 100.

Front

What is percent change?

Back

Percent change is a measure of how much a quantity has changed in relation to its original amount, expressed as a percentage.

Front

How do you calculate percent change?

Back

Percent change = ((New Value - Original Value) / Original Value) x 100.

Front

If a scooter's price decreases from $65.50 to $52.40, what is the percent decrease?

Back

20%.

Front

If you finish a level in a video game in 32 minutes and then in 28 minutes, what is the percent change in time?

Back

Decrease 12.5%.

Front

What is the formula for calculating the amount spent based on a percentage of earnings?

Back

Amount spent = (Percentage / 100) x Total Earnings.

Front

If Sarah earns $20 and spends 30% of it, how much does she spend?

Back

$6.

Front

What is the original price if a purse is now $54 after a 20% increase?

Back

$45.

Front

If the price of tickets increases from $100 to $120, what is the percent change?

Back

20%.