Six tools covering every everyday percentage sum — from “what is 18% of 250” through to VAT and percentage change. Each one shows the working step by step.
A percentage is a hundredth part of a whole. Writing 18% means 18 parts out of a hundred, which is the fraction 18/100 = 0.18. That is why any percentage question can be turned into a multiplication or a division — you only have to convert the percentage into a decimal first.
School really only asks three: find a percentage of a number (18% of 250), find what percentage one number is of another (45 out of 250), and find the whole from one of its percentages (45 is 18% — what is the total). Each type has its own calculator here.
A rise from 20% to 25% is a rise of 5 percentage points, but of 25% in relative terms. That distinction is the single most common slip in exam questions and in the press, so the percentage change calculator shows both figures side by side.
Turn 18% into 0.18 and multiply: 0.18 × 250 = 45. The calculator does it instantly and shows every step.
A percentage point is the plain difference between two percentages. A percent is a relative change. Going from 20% to 25% is +5 percentage points and +25%.
Yes, every Mathema calculator is free, with no sign-up and no cap on how many sums you run.
Yes — the step-by-step working sits next to the answer, so you can write out the whole method rather than just the final number.
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