Percent Change and Error - Check In

Front

What is percent error?

Back

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

Front

How do you calculate percent error?

Back

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

Front

What is the formula for percent decrease?

Back

Percent decrease = (Original Price - Sale Price) / Original Price × 100%.

Front

If a price decreases from $80 to $60, what is the percent decrease?

Back

Percent decrease = (80 - 60) / 80 × 100% = 25%.

Front

What is the formula for percent increase?

Back

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

Front

If a population increases from 200 to 250, what is the percent increase?

Back

Percent increase = (250 - 200) / 200 × 100% = 25%.

Front

What does a percent change of 0% indicate?

Back

A percent change of 0% indicates that there has been no change in value.

Front

How do you find the actual value from an estimated value and percent error?

Back

Actual Value = Estimated Value - (Estimated Value × Percent Error / 100%).

Front

What is the difference between percent increase and percent decrease?

Back

Percent increase measures how much a value has grown, while percent decrease measures how much a value has shrunk.

Front

If a product's price is $50 and it is marked down by 20%, what is the sale price?

Back

Sale Price = Original Price - (Original Price × Percent Decrease) = 50 - (50 × 0.20) = $40.