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Learn how to calculate percentage the easy way — percent of a number, marks percentage, percentage increase and decrease, percentage change and difference, profit, loss, discount, GST and simple interest. 20 short lessons with fresh practice questions every time, step-by-step help, worksheets, badges and free certificates.
💯 Quick check: What percent means
Each lesson has the idea, a worked example, unlimited practice with “Show me how”, a 20-question test and worksheets. Pass a lesson’s test to earn its badge; pass every lesson in a part to earn that part’s certificate (sign in to keep badges, certificates and progress).
Ages 9–11 (Class 4–6) — per hundred, percent as a fraction and as a decimal, easy percentages of 100 and 200, and the 10%, 25% and 50% shortcuts.
Ages 10–13 (Class 5–8) — percentage of a number, what percent one number is of another, marks percentage, and finding the whole from a percent.
Ages 12–16 (Class 7–10) — percentage increase, percentage decrease, percentage change, percentage difference between two numbers, and two changes in a row.
Ages 12–16 (Class 7–10) — profit percentage, loss percentage, discount, GST and tax, simple interest, and a mixed final test.
A percentage is a number out of 100: “per cent” means “for every hundred”, so 45% means 45 out of every 100. To calculate a percentage, divide the part by the whole and multiply by 100 — 18 out of 24 is 18 ÷ 24 × 100 = 75%. To find a percentage of a number, multiply and divide by 100 — 35% of 80 is 35 × 80 ÷ 100 = 28. Percentages let us compare things of different sizes: marks out of 80 and out of 500, a ₹40 price rise on a ₹200 bag and on a ₹2000 phone. This free course is useful from Class 4 to Class 10: Part 1 (ages 9–11) explains what a percent is and the 10%, 25% and 50% shortcuts, Part 2 (ages 10–13) covers percentage of a number, what percent one number is of another, marks and finding the whole, Part 3 (ages 12–16) covers percentage increase, decrease, change and difference, and Part 4 (ages 12–16) uses percentages with money: profit, loss, discount, GST and simple interest. Every lesson explains the method, works an example, and gives unlimited practice with “Show me how”, a 20-question test, a badge and printable worksheets.
40 questions per sheet with an answer key — print, save as PDF or solve online.
Prefer a real teacher? TalentJR teachers take live online classes anywhere in India. Tell us what you need and our team will call you with timings and fees.
Divide the part by the whole and multiply by 100: 18 out of 24 is 18 ÷ 24 × 100 = 75%. To find a percentage of a number, multiply the percent by the number and divide by 100: 35% of 80 = 35 × 80 ÷ 100 = 28.
प्रतिशत निकालने के लिए भाग को पूरे से भाग दें और 100 से गुणा करें: 45 ÷ 50 × 100 = 90%। किसी संख्या का प्रतिशत निकालने के लिए गुणा करके 100 से भाग दें: 150 का 20% = 20 × 150 ÷ 100 = 30।
Find the change (new − old for an increase, old − new for a decrease), divide it by the OLD value and multiply by 100. From 80 to 100 is a 20 ÷ 80 × 100 = 25% increase; from 100 to 80 is a 20 ÷ 100 × 100 = 20% decrease.
Percentage change compares a new value with an old one, so you divide by the old value. Percentage difference compares two values side by side, where neither comes first, so you divide by their average: 40 and 60 differ by 20 ÷ 50 × 100 = 40%.
Add the marks you scored and the total marks of all subjects, then divide and multiply by 100. 432 out of 500 is 432 × 100 ÷ 500 = 86.4%.
It is for ages 9–16 (Class 4 to Class 10). Part 1 (ages 9–11) explains what a percent is and the easy shortcuts, Part 2 (ages 10–13) covers percentage of a number and marks, and Parts 3 and 4 (ages 12–16) cover percentage change, profit, loss, discount, GST and simple interest.
Sign in and pass the 20-question test of a lesson (16 or more right) to earn its badge. Pass every lesson in a part — Part 1 is lessons 1–5, Part 2 is 6–9, Part 3 is 10–14, Part 4 is 15–20 — and you get that part’s certificate, with a code anyone can check.
Yes. Every lesson has free printable worksheets with 40 questions and an answer key. Print them, save them as PDF or solve them online.
Yes. All 20 lessons, practice, tests, worksheets, badges and certificates are free. Classes with a TalentJR teacher (live online) are paid — request a call back for fees.
TalentJR teachers take live online maths classes anywhere in India. Use “Classes near you” on this page and our team will call you.