Percentage Increase & Decrease

Front

What is percentage increase?

Back

Percentage increase is a way to express how much a quantity has grown relative to its original amount, calculated as: ((New Value - Original Value) / Original Value) x 100.

Front

What is percentage decrease?

Back

Percentage decrease is a way to express how much a quantity has reduced relative to its original amount, calculated as: ((Original Value - New Value) / Original Value) x 100.

Front

How do you calculate the new value after a percentage decrease?

Back

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

Front

How do you calculate the new value after a percentage increase?

Back

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

Front

If a product costs $50 and is on sale for 20% off, what is the sale price?

Back

Sale Price = $50 - ($50 x 0.20) = $40.

Front

What is the formula to find the original price before a discount?

Back

Original Price = Sale Price / (1 - Discount Rate).

Front

If a shirt sold for $30 after a 25% discount, what was the original price?

Back

Original Price = $30 / (1 - 0.25) = $40.

Front

What is the percentage increase if a salary goes from $20,000 to $25,000?

Back

Percentage Increase = ((25,000 - 20,000) / 20,000) x 100 = 25%.

Front

What is the percentage decrease if a population goes from 1,000 to 800?

Back

Percentage Decrease = ((1,000 - 800) / 1,000) x 100 = 20%.

Front

If a car's value decreases from $15,000 to $12,000, what is the percentage decrease?

Back

Percentage Decrease = ((15,000 - 12,000) / 15,000) x 100 = 20%.