Percent Change - Calculations

Front

What is Percent Change?

Back

Percent Change is a way to express a change in value as a percentage of the original value.

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 the formula for finding the new value after a percent increase?

Back

New Value = Original Value + (Original Value x Percent Increase / 100).

Front

What is the formula for finding the new value after a percent decrease?

Back

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

Front

If the original price of an item is $50 and it increases to $60, what is the percent increase?

Back

Percent Increase = ((60 - 50) / 50) x 100 = 20%.

Front

If the original price of an item is $10 and it decreases to $8, what is the percent decrease?

Back

Percent Decrease = ((10 - 8) / 10) x 100 = 20%.

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

If a student's grade goes from 80 to 90, what is the percent increase?

Back

Percent Increase = ((90 - 80) / 80) x 100 = 12.5%.

Front

What is a common mistake when calculating percent change?

Back

A common mistake is to confuse percent increase with percent decrease, leading to incorrect calculations.