Percent Increase and Decrease

Front

What is Percent Increase?

Back

Percent Increase is the amount of increase expressed as a percentage of the original amount. It is calculated using the formula: Percent Increase = \( \frac{(New Value - Original Value)}{Original Value} \times 100 \)

Front

What is Percent Decrease?

Back

Percent Decrease is the amount of decrease expressed as a percentage of the original amount. It is calculated using the formula: Percent Decrease = \( \frac{(Original Value - New Value)}{Original Value} \times 100 \)

Front

How do you calculate a 10% increase on a number?

Back

To calculate a 10% increase on a number, multiply the number by 0.10 and then add that value to the original number. Example: For 100, 10% increase = 100 + (100 \times 0.10) = 110.

Front

How do you calculate a 15% decrease on a number?

Back

To calculate a 15% decrease on a number, multiply the number by 0.15 and then subtract that value from the original number. Example: For 200, 15% decrease = 200 - (200 \times 0.15) = 170.

Front

What is the multiplier for a 20% increase?

Back

The multiplier for a 20% increase is 1.20. This means you multiply the original amount by 1.20 to find the new amount.

Front

What is the multiplier for a 25% decrease?

Back

The multiplier for a 25% decrease is 0.75. This means you multiply the original amount by 0.75 to find the new amount.

Front

If a shirt costs $40 and is on sale for 30% off, what is the sale price?

Back

To find the sale price, calculate 30% of $40, which is $12. Then subtract that from the original price: $40 - $12 = $28.

Front

What is 50% of $80?

Back

50% of $80 is calculated as follows: 50% of $80 = \( 0.50 \times 80 = 40 \).

Front

If a car's value decreases from $20,000 to $15,000, what is the percent decrease?

Back

Percent Decrease = \( \frac{(20000 - 15000)}{20000} \times 100 = 25\% \).

Front

How do you find the new salary after a 5% raise on a $50,000 salary?

Back

To find the new salary, calculate 5% of $50,000, which is $2,500. Then add that to the original salary: $50,000 + $2,500 = $52,500.