Percentage decrease Calculator

For instance, if you paid $200 last month to heat your home but only $140 this month, the cost has fallen by $60. You can deduce that the cost of heating your home has lowered by 30% when expressed as a percentage decrease.

Percent Decrease Formula

Our Percentage Decrease Calculator uses the following method:

Percent Decrease \(= 100 -\dfrac{new} {old} × 100\)

If you are aware of the initial amount or price and are attempting to calculate what it would be if it were reduced by a specific %. Then the formula is:

Decreased value \(= base \space – base \space ×\% \dfrac{decrease}{100}\)

where the base is the beginning amount and %decrease is the desired reduction in percentage. You can also solve this by using the percentage difference calculator and the percentage change calculator.

How to use the Percentage Decrease Calculator

1. Fill in the appropriate input form with the actual and lowered amounts.
2. Click Solve
3. The output field will show the percentage decrease.

Examples

Example 1: Let’s suppose you enter a store and discover an item is 40% off because of a sale. How do you calculate the ultimate amount you must pay if the original cost was $100?

You can calculate it by entering the figures into the second formula above to arrive at the final price of \($100 \space – $100 × \dfrac{40}{100} = $100 \space – $100 × 0.4 = $100 \space – $40 = $60.\)

However, you would use the first calculation if you knew the previous price was $100 and the new price was $60 and you wanted to determine the % decrease: The drop is 40% when

\(= 100 \space – \dfrac{$60}{$100} × 100\)

\(= 100 \space – 0.6 × 100 \)

\(= 100 \space – 60\)

\(= 40\)

FAQs