Percent Change and Error - Check In

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 increase?

Back

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

Front

How do you calculate percent decrease?

Back

Percent decrease = ((Original Value - New Value) / Original Value) 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 true value.

Front

How do you calculate percent error?

Back

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

Front

If a class size increases from 35 to 42, what is the percent change?

Back

Percent change = ((42 - 35) / 35) x 100 = 20% increase.

Front

If a fossil was estimated to be 520 years old but is actually 500 years old, what is the percent error?

Back

Percent error = (|520 - 500| / 500) x 100 = 4%.

Front

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

Back

Percent decrease = ((60 - 36) / 60) x 100 = 40%.

Front

What is the formula for calculating the sale price after a percent decrease?

Back

Sale Price = Original Price - (Original Price x Percent Decrease).

Front

If a scooter's regular price is $65.50 and it is on sale for $52.40, what is the percent decrease?

Back

Percent decrease = ((65.50 - 52.40) / 65.50) x 100 = 20%.