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CASIO

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Percent Calculations

Calculation Type Calculation Formula Calculation Method and Key Operations
Percentage
Example 1		 A × B100 What is B percent of A?
AB(%)
Ratio
Example 2		 AB × 100 What percent of B is A?
AB(%)
Premium
Example 3		 A + A × B100 What is A increased by B percent?
AB(%)
Discount
Example 4
Example 5		 A - A × B100 What is A decreased by B percent?
AB(%)
Rate of Change (1)
Example 6		 A + BB × 100 If A is added to B, by what percent does B change?
AB(%)
Rate of Change (2)
Example 7		 A - BB × 100 If B becomes A, by what percent does B change?
AB(%)

Example 1: To calculate 12% of 1500　(180)

  • 150012(%)
  • 180.

Example 2: To calculate what percentage of 880 is 660　(75%)

  • 660880(%)
  • 75.

Example 3: To increase 2500 by 15%　(2875)

  • 250015(%)
  • 2875.

Example 4: To decrease 3500 by 25%　(2625)

  • 350025(%)
  • 2625.

Example 5: To decrease the sum of 168, 98, and 734 by 20%　(800)

  • 16898734(STO)(A)
    (A)    *20(%)
  • 800.

* As shown here, if you want to use the current Answer Memory value in a mark up or discount calculation, you need to assign the Answer Memory value into a variable and then use the variable in the mark up/discount calculation. This is because the calculation performed when (%) is pressed stores a result to Answer Memory before the key is pressed.


Example 6: 300 grams are added to a test sample originally weighing 500 grams, producing a final test sample of 800 grams. What percent of 500 grams is 800 grams?　(160%)

  • 300500(%)
  • 160.

Example 7: What is the percentage change when a value is increased from 40 to 46? How about to 48?　(15%, 20%)

  • 4640(%)
  • 15.
  • 8
  • 20.
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