Percent Increase and Decrease

Front

What is percent increase?

Back

Percent increase is a measure of how much a quantity has grown relative to its original amount, expressed as a percentage.

Front

What is percent decrease?

Back

Percent decrease is a measure of how much a quantity has shrunk relative to its original amount, expressed as a percentage.

Front

How do you calculate percent increase?

Back

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

Front

How do you calculate percent decrease?

Back

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

Front

If a shirt costs $50 and is on sale for $40, what is the percent decrease?

Back

Percent Decrease = ((50 - 40) / 50) x 100 = 20%.

Front

If a student scores 70 on a test and then scores 85 on the next test, what is the percent increase in score?

Back

Percent Increase = ((85 - 70) / 70) x 100 = 21.43%.

Front

What is the formula to find the final amount after a percent increase?

Back

Final Amount = Original Amount + (Original Amount x Percent Increase).

Front

What is the formula to find the final amount after a percent decrease?

Back

Final Amount = Original Amount - (Original Amount x Percent Decrease).

Front

If a product originally costs $200 and is discounted by 15%, what is the sale price?

Back

Sale Price = 200 - (200 x 0.15) = $170.

Front

What does it mean if a population increases by 10%?

Back

It means the new population is 110% of the original population.