5.1 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 change?

Back

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

Front

If a class size increases from 27 to 30, what is the percent change?

Back

11% increase.

Front

What is the formula for calculating the new amount after a percent increase?

Back

New Amount = Original Amount + (Original Amount × Percent Increase).

Front

Calculate the percent increase from $18 to $45.

Back

150% increase.

Front

What is the new amount if you increase 710 points by 10%?

Back

781 points.

Front

If a camera's price decreases from $50 to $38, what is the percent change?

Back

24% decrease.

Front

How do you find the new amount after a percent decrease?

Back

New Amount = Original Amount - (Original Amount × Percent Decrease).

Front

What is a 5% increase on 12,000 miles?

Back

12,600 miles.