Percent of Change

Front

What is Percent of Change?

Back

Percent of Change is a way to express how much a quantity has increased or decreased in relation to its original amount, expressed as a percentage.

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

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

Back

Percent Increase = ((75 - 50) / 50) x 100 = 50%.

Front

If a population decreases from 200 to 150, what is the percent decrease?

Back

Percent Decrease = ((200 - 150) / 200) x 100 = 25%.

Front

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

Back

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

Front

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

Back

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

Front

A shirt costs $40 and is on sale for 30% off. What is the sale price?

Back

Sale Price = 40 - (40 x 0.30) = $28.

Front

If a student scores 80 out of 100 on a test, what is the percent score?

Back

Percent Score = (80 / 100) x 100 = 80%.

Front

What does it mean if a quantity has increased by 100%?

Back

It means the quantity has doubled.