Percent Error Problems

Front

What is Percent Decrease?

Back

Percent decrease is a measure of how much a quantity has decreased relative to its original amount, expressed as a percentage.

Front

How do you calculate Percent Error?

Back

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

Front

What does a Percent Increase indicate?

Back

Percent increase indicates how much a quantity has increased relative to its original amount, expressed as a percentage.

Front

If a quantity decreases by 5%, what is the new quantity if the original was 420?

Back

New Quantity = 420 - (5% of 420) = 399.

Front

What is the formula for calculating Percent Increase?

Back

Percent Increase = (New Value - Original Value) / Original Value * 100%.

Front

What is the expected number of songs if a band writes 75% more than 16?

Back

Expected number of songs = 16 + (75% of 16) = 28.

Front

If 50% of songs are removed from 28, how many songs remain?

Back

Remaining songs = 28 - (50% of 28) = 14.

Front

What is the Percent Error if the estimated value is 5.5 cm and the actual value is 5.62 cm?

Back

Percent Error = |(5.5 - 5.62)| / 5.62 * 100% = 2.13%.

Front

What is the Percent Error of a prediction of 227 students when the actual number is 250?

Back

Percent Error = |(227 - 250)| / 250 * 100% = 9.2%.

Front

What does a decrease of 5% mean in terms of subscribers?

Back

It means the number of subscribers has reduced by 5% of the original number.