Percent Error and Multipliers

Front

What is Percent Error?

Back

Percent Error is a measure of how inaccurate a measurement is, expressed as a percentage of the actual value. It is calculated using the formula: (|Estimated Value - Actual Value| / Actual Value) x 100.

Front

How do you calculate a 25% increase on a value?

Back

To calculate a 25% increase, multiply the original value by 0.25 and then add that amount to the original value. For example, for $30: 30 + (30 x 0.25) = $37.50.

Front

What is a Multiplier for a 10% increase?

Back

The multiplier for a 10% increase is 1.10. This means you multiply the original value by 1.10 to find the new value.

Front

How do you find the new price after a 30% markup?

Back

To find the new price after a 30% markup, multiply the original price by 1.30. For example, if the original price is $75: 75 x 1.30 = $97.50.

Front

What is the formula for calculating Percent Error?

Back

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

Front

If a watermelon weighs 5.2 lbs and has a 10% measurement error, how do you find the measured weight?

Back

To find the measured weight with a 10% error, calculate 10% of 5.2 lbs (which is 0.52 lbs) and subtract it from the actual weight: 5.2 - 0.52 = 4.68 lbs.

Front

What is the Multiplier for a 20% decrease?

Back

The multiplier for a 20% decrease is 0.80. This means you multiply the original value by 0.80 to find the new value.

Front

How do you calculate a 10% decrease on a value?

Back

To calculate a 10% decrease, multiply the original value by 0.10 and then subtract that amount from the original value. For example, for $100: 100 - (100 x 0.10) = $90.

Front

What is the new price if an item originally costs $50 and is marked up by 20%?

Back

To find the new price after a 20% markup, multiply the original price by 1.20: 50 x 1.20 = $60.

Front

What does a 0.5 multiplier represent?

Back

A 0.5 multiplier represents a 50% decrease in value. It means the new value is half of the original value.