Add or Subtract a Percentage

Calculate: tips, sales price, percent off, discounted price, price with sales tax, etc.




Start Value  % of Start Value End Value
      %  =  
 



(Enter values into the blue boxes. Answer will appear in the black box.)
Answers are rounded to 7 decimal places.



Examples

Example 1:
Your restaurant bill is $56.47 and you want to leave a 15% tip.
How much is the tip?
How much is the total amount of the bill with the tip?


Start Value       % of Start Value End Value
56.47 + 15% 64.94

The amount of the tip is: 15% of $56.47 = $8.47 (which will be displayed under the % of Start Value box in the calculator)
The total restaurant bill plus the tip is: $56.47 + $8.47 = $64.94
Click to show this example in the calculator above.



Example 2:
You have a 25 percent off coupon. The item you want to buy is $129.99
How much money will the coupon save you?
What is the cost of the item after using the coupon?


Start Value   % of Start Value End Value
129.99 - 25% 97.49

The amount you will save is: 25% of $129.99 = $32.50 (which will be displayed under the % of Start Value box in the calculator)
The cost of the item after using the coupon is: $129.99 - $32.50 = $97.49
Click to show this example in the calculator above.



Example 3:
The sales tax rate is 8%
An item costs $49.99
What is the amount of sales tax?
What is the total cost of the item with sales tax.


Start Value   % of Start Value End Value
49.99 + 8% 53.99

The amount of sales tax is: 8% of $49.99 = $4.00 (which will be displayed under the % of Start Value box in the calculator)
The total cost with tax is: $49.99 + $4.00 = $53.99
Click to show this example in the calculator above.