Percent Change/Percent Error

Front

What is percent change?

Back

Percent change is a way to express a change in a quantity as a percentage of the original amount. It is calculated using the formula: ((new value - old value) / old value) x 100.

Front

How do you calculate percent increase?

Back

To calculate percent increase, use the formula: ((new value - old value) / old value) x 100. This shows how much a value has increased relative to its original amount.

Front

How do you calculate percent decrease?

Back

To calculate percent decrease, use the formula: ((old value - new value) / old value) x 100. This shows how much a value has decreased relative to its original amount.

Front

What is percent error?

Back

Percent error is a measure of how inaccurate a measurement is, compared to the true value. It is calculated using the formula: (|estimated value - actual value| / actual value) x 100.

Front

If a price increases from $5 to $8, what is the percent increase?

Back

60%.

Front

If a price decreases from $60 to $36, what is the percent decrease?

Back

40%.

Front

If a car is bought for $25,000 and sold for $16,000, what is the percent decrease?

Back

36%.

Front

If Zed estimated 350 chips but found only 210, what is his percent error?

Back

67%.

Front

If the estimated attendance for a game was 15,000 but only 12,500 attended, what is the percent error?

Back

20%.

Front

What is the formula for calculating percent change?

Back

Percent Change = ((new value - old value) / old value) x 100.