Percentage Calculator

Divide the part by the total and multiply the result by 100. For example, 450 out of 600 is (450 ÷ 600) × 100 = 75%. On this page, choose "X is what % of Y?", enter 450 in the first box and 600 in the second, and press Calculate — you get 75% along with the working, the same figure as a decimal and as a fraction, and how much is left over.

Percentage = (Part ÷ Total) × 100. Everything else follows from it: the percentage of an amount is (Percentage ÷ 100) × Total, a percentage increase is ((New − Original) ÷ Original) × 100, and a percentage decrease is ((Original − New) ÷ Original) × 100. All of them are worked out for you above, and each result shows the formula it used.

Divide the percentage by 100 and multiply the amount by it: (15 ÷ 100) × 2,000 = 300. Use the "What is X% of Y?" mode — it also shows you the amount with that percentage added on and with it taken off, which is what you need for GST, a discount or a commission.

Subtract the original value from the new value, divide the result by the original value, and multiply by 100. A salary going from ₹25,000 to ₹31,500 is ((31,500 − 25,000) ÷ 25,000) × 100 = a 26% increase. The common mistake is dividing by the new value instead of the original one — the number you started with is always the denominator.

Subtract the new value from the original value, divide by the original value, and multiply by 100. A price falling from ₹1,200 to ₹900 is ((1,200 − 900) ÷ 1,200) × 100 = a 25% decrease. Note that a 25% fall does not undo a 25% rise: going up 25% from 1,200 gives 1,500, and coming back down to 1,200 from there is a 20% decrease.

Percentage change measures how far a value moved from a known starting point, so it is divided by the original value. Percentage difference compares two values where neither is the baseline, so it is divided by their average. Going from 80 to 100 is a 25% increase, but the percentage difference between 80 and 100 is 22.22%. Use increase or decrease for before-and-after figures, and difference for two independent readings, quotes or scores.

If you know the answer and the percentage but not the original amount, divide instead of multiplying: 15% of something is 300, so the something is 300 ÷ 0.15 = 2,000. This is what you need to find a pre-GST price from a total, or a list price from a discounted one.

Use the Marks Percentage Calculator at tools.indianjobshub.com/marks-percentage-calculator. It is built for a mark sheet specifically: enter your marks and the total, or add a row per subject, and it gives the percentage along with your grade, division and whether you have cleared the pass mark. The maths is the same as "X is what % of Y?" here, with the parts a student actually needs added on top.

Yes. Decimals work in every mode, and you can paste values with commas such as 1,50,000. Negative values are accepted in the increase, decrease and difference modes and handled correctly — a change is always measured against the size of the original value, so a rise from −200 to −100 reads as an increase, not a decrease.

No. Unlike our image and PDF tools, this calculator sends nothing to a server at all — the arithmetic runs inside your browser on your own device. Your figures are not uploaded, not logged and not stored, and they disappear the moment you close the tab.

It is completely free, with no sign-up, no email address to hand over and no daily limit. It is fully responsive on Android and iPhone as well as desktop, and because the page does no network work after it loads, the calculations keep working even if your connection drops.