eGigFree Percentage Calculator: Marks, Change and Discounts
Work out marks percentage, a percent of a number, a percent change, and a percent added or taken off.
Marks percentage
Percentage
What is X% of Y?
Answer
X is what percent of Y?
Answer
Percent increase or decrease
Change
Add or take off a percentage
After adding
After taking off (discount)
Price before a percentage was added
Before it was added
For invoices, the GST calculator also splits CGST and SGST.
Percentage formulas
Marks: marks ÷ total × 100. 432 out of 500 is 86.4%.
X% of Y: X ÷ 100 × Y. 15% of 2,000 is 300.
Change: (new − old) ÷ old × 100. From 50,000 to 60,000 is a rise of 20%.
Taking a percentage out: final amount ÷ (1 + percent ÷ 100). 1,180 with 18% added was 1,000 before. A common mistake is to take 18% of 1,180, which gives the wrong answer.
Questions people ask
How do I calculate the percentage of marks?
Divide your marks by the total and multiply by 100. For 432 out of 500, 432 ÷ 500 × 100 = 86.4%.
How do I calculate a percentage increase?
Take the new value minus the old value, divide by the old value, and multiply by 100. From 50,000 to 60,000 is a rise of 20%.
How do I take 18% out of a total?
Divide the total by 1.18. So ₹1,180 including 18% is ₹1,000 before it was added. Taking 18% of 1,180 gives the wrong answer.
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