PERCENT CHANGE/ERROR

Front

What is percent change?

Back

Percent change is a way to express a change in value as a percentage of the original value. It is calculated using the formula: ((New Value - Original Value) / Original Value) x 100.

Front

How do you calculate percent increase?

Back

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

Front

How do you calculate percent decrease?

Back

To calculate percent decrease, use the formula: ((Original Value - New Value) / Original Value) x 100. This shows how much a value has decreased compared 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 an item costs $20 and is sold for $50, what is the percent increase?

Back

150% increase.

Front

If the temperature rises from 10° to 15°, what is the percent change?

Back

50% increase.

Front

If Mr. Nacerino estimated 48 minutes to run 8 miles but took 60 minutes, what is his percent error?

Back

20% error.

Front

A school's population increased from 1250 to 2000 students. What is the percent increase?

Back

60% increase.

Front

If American cheese costs $5 per pound and rises to $6, what is the percent change?

Back

20% increase.

Front

What does a percent increase of 100% mean?

Back

A percent increase of 100% means the new value is double the original value.