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 - Original Value) / Original 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 the estimated length is 32 in. and the actual length is 54 in., what is the percent error?

Back

40.7%.

Front

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

Back

65%.

Front

What is the formula to find the percentage of a part compared to a whole?

Back

Percentage = (Part / Whole) x 100.

Front

If 15% of toddlers have food allergies and 14,500 parents were polled, how many parents made this claim?

Back

2,175 parents.

Front

What is the percent of 18 songs out of 125?

Back

14.4%.

Front

How do you round a percentage to the nearest tenth?

Back

Look at the hundredths place; if it's 5 or more, round up.