Percent Increase, Decrease, Error

Front

What is percent decrease?

Back

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

Front

How do you calculate percent decrease?

Back

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

Front

What is percent increase?

Back

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

Front

How do you calculate percent increase?

Back

Percent increase = ((New Price - Original Price) / Original Price) x 100.

Front

What is percent error?

Back

Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the actual value.

Front

How do you calculate percent error?

Back

Percent error = (|Measured Value - Actual Value| / Actual Value) x 100.

Front

If a TV's price decreased from $200 to $160, what is the percent decrease?

Back

20%.

Front

If the deer population was estimated at 17,600 but counted at 21,300, what is the percent error?

Back

17.4%.

Front

If Lisa predicted a temperature of 60 degrees but it reached 80 degrees, what is her percent error?

Back

25%.

Front

What does a percent increase of 20% mean in a real-world context?

Back

It means the new value is 20% greater than the original value.