Percent Change

Front

What is percent change?

Back

Percent change is a way to express a change in value as a percentage of the original value. It is calculated using the formula: ((new value - original value) / original value) x 100.

Front

How do you calculate a percent increase?

Back

To calculate a percent increase, subtract the original value from the new value, divide by the original value, and then multiply by 100. Formula: ((new value - original value) / original value) x 100.

Front

How do you calculate a percent decrease?

Back

To calculate a percent decrease, subtract the new value from the original value, divide by the original value, and then multiply by 100. Formula: ((original value - new value) / original value) x 100.

Front

If a price increases from $50 to $75, what is the percent increase?

Back

The percent increase is 50%. Calculation: ((75 - 50) / 50) x 100 = 50%.

Front

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

Back

The percent decrease is 25%. Calculation: ((80 - 60) / 80) x 100 = 25%.

Front

What is 40% of 200?

Back

40% of 200 is 80. Calculation: 200 x 0.40 = 80.

Front

If 30% of a class of 40 students are girls, how many girls are in the class?

Back

There are 12 girls in the class. Calculation: 40 x 0.30 = 12.

Front

What is the original price if a shirt is sold for $30 after a 25% discount?

Back

The original price is $40. Calculation: $30 = original price - (0.25 x original price) => original price = $30 / 0.75 = $40.

Front

How do you find the total after a percent increase?

Back

To find the total after a percent increase, multiply the original amount by (1 + percent increase as a decimal). For example, for a 20% increase: total = original amount x 1.20.

Front

How do you find the total after a percent decrease?

Back

To find the total after a percent decrease, multiply the original amount by (1 - percent decrease as a decimal). For example, for a 15% decrease: total = original amount x 0.85.