Percent Change and Percent Error

Front

What is percent change?

Back

Percent change is a measure of how much a quantity has increased or decreased relative to its original value, expressed as a percentage.

Front

How do you calculate percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) x 100.

Front

What is percent error?

Back

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

Front

How do you calculate percent error?

Back

Percent Error = (|Estimated Value - Actual Value| / Actual Value) x 100.

Front

If 52 out of 80 marbles are red, what percent of the marbles are red?

Back

65%.

Front

If Alex buys a car for $45,800 and sells it for $61,830, what is the percent of change?

Back

35% increase.

Front

If 27 out of 120 reptile owners own snakes, what percent own snakes?

Back

22.5%.

Front

What is the percent change from $18.50 to $22.10?

Back

19.5% increase.

Front

What is the percent change from 53 words to 62 words?

Back

17.0% increase.

Front

What does a percent increase indicate?

Back

A percent increase indicates that the new value is greater than the original value.