8.6.5 Percent Change

Front

What is percent change?

Back

Percent change is a way to express how much a quantity has increased or decreased relative to its original amount, calculated as (new value - old value) / old value × 100%.

Front

How do you calculate percent increase?

Back

To calculate percent increase, use the formula: ((new value - old value) / old value) × 100%.

Front

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

Back

11%.

Front

What is the percent increase from 13 desserts to 14 desserts?

Back

8%.

Front

How do you round a percent increase to the nearest percent?

Back

Look at the decimal part: if it's 0.5 or higher, round up; if it's less than 0.5, round down.

Front

What is the percent increase from $5 to $8?

Back

60%.

Front

How do you find the percent decrease?

Back

Percent decrease is calculated using the formula: ((old value - new value) / old value) × 100%.

Front

If the original amount is 16 and the new amount is 11, what is the percent change?

Back

31%.

Front

What is the percent increase from 37 to 125?

Back

238%.

Front

What does a percent change of 0% indicate?

Back

A percent change of 0% indicates that there has been no change in the value.