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Percentage Calculator Online Free
Three percentage calculators in one: find X% of Y, find what percent X is of Y, and calculate percentage change between two numbers. Instant results for any calculation.
Percentage Formula
1. X% of Y = X x Y / 100. 2. X is what % of Y = X / Y x 100. 3. Percentage change = (new - old) / |old| x 100. The percentage calculator above uses all three formulas.
Percentage Increase Calculator
Percentage increase = (new value - old value) / old value x 100. If price went from Rs 200 to Rs 250: increase = 50/200 x 100 = 25% increase. Enter values in the calculator above for instant result.
Marks Percentage Calculator India
Percentage = marks obtained / total marks x 100. For 450 marks out of 500: percentage = 450/500 x 100 = 90%. For multiple subjects, add all marks then divide by total maximum marks.
GST Percentage Calculator
GST added: total = base x (1 + rate/100). GST removed: base = total / (1 + rate/100). For 18% GST on Rs 10,000: total = 10000 x 1.18 = Rs 11,800. Use the GST calculator for detailed breakdown.
Frequently Asked Questions
How to calculate percentage of marks?
Percentage = total marks obtained / total maximum marks x 100. For 378 marks out of 450: 378/450 x 100 = 84%. For multiple subjects, add all obtained marks together and divide by sum of all maximum marks, then multiply by 100.
What is percentage increase formula?
Percentage increase = (new value - old value) / old value x 100. Example: salary increased from Rs 40,000 to Rs 46,000. Increase = 6000/40000 x 100 = 15% increase. Use the percentage calculator above for any values.
How to find what percent one number is of another?
Divide the first number by the second and multiply by 100. Example: 35 is what percent of 200? Answer = 35/200 x 100 = 17.5%. The percentage calculator section 2 does this calculation automatically.
What is the difference between percentage and percentage points?
If tax rate rises from 5% to 7%, that is 2 percentage points increase but 40% increase in the rate. Percentage points measure arithmetic difference. Percentage change measures relative change. This confusion is common in finance and politics.
How to calculate reverse percentage?
To find original price after percentage change: divide by (1 + rate/100) for increase, or divide by (1 - rate/100) for decrease. Rs 1,180 after 18% GST added: original = 1180/1.18 = Rs 1,000. Rs 800 after 20% discount: original = 800/0.80 = Rs 1,000.