Grade 8 Percent Increase & Decrease Worksheets
Grow or shrink an amount by a percentage — and work back again.
Every sheet below is generated fresh with a matching answer key. Pick one of the three levels, preview it, and print or download the PDF — no account, no watermark. For the other grade 8 word problems skills, see all word problems worksheets.
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Word Problems · Grade 8
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Grade 8 · 3 pages · A4What each level generates
Grade 8 percent increase & decrease — the exact skill behind each difficulty setting, straight from the generator.
- Level 1The new amount
- Level 2Find the percent change
- Level 3Work back to the original
Grade levels follow the progression common to most English-language curricula — not one specific national curriculum. Every level shows exactly what it generates, so you can check the fit with your own program. See the full scope & sequence →
More Grade 8 word problems skills
Each one generates a different kind of question, with its own three levels and answer key.
- Rates & SpeedWords per minute, kilometres per hour — find a rate and then use it.
- Discount & Sale PriceSale prices, savings, and a price with tax added on top.
- Profit StoriesBuy, sell, and work out the profit — as money and as a percentage.
- Simple InterestInterest earned, the total in the account, and finding the rate.
- Multi-Step ProblemsTwo or three operations chained together in one story.
Frequently asked questions
▸What word problems should a Grade 8 student master?
Percent-change problems, steady-rate problems (kilometres, pages or parcels per hour, and words per minute), and simple-interest calculations. The Percent Increase & Decrease, Rates & Speed and Simple Interest sub-skills generate exactly those, with clean whole-number answers.
▸How do these help prepare for algebra?
They reward writing each story as an expression — say, 5000 × 120/100 for a 20% rise, or principal × rate × years for interest — before computing. Getting fluent at turning a situation into a symbolic step is precisely the move Grade 8 algebra formalises, so the practice transfers directly.
▸Are the answers always whole numbers?
Yes. Populations, distances, and interest are all built so the result is an exact whole number — a growing population comes out in whole people, a distance comes out in whole kilometres, and interest is a whole-dollar amount — so answers stay clean while the setup stays demanding.
▸Can I run the same test across a class and again weeks later?
Yes. The shareable link reproduces the identical problems and answer key every time it opens, so a class-wide test and a later re-test compare like for like. Press Shuffle whenever you want a fresh version instead.
▸Do these worksheets cover exponents, equations, or scientific notation?
Not on these sheets — they target percent change, rate, and simple-interest reasoning, the applied backbone of Grade 8. All three are on the site elsewhere, though, so it is worth knowing where. Exponents are covered under other names: Powers of Integers at Grade 8 does squares, cubes and two powers multiplied, Squares at Grade 6 drills the square numbers on their own, and Powers in Expressions at Grades 6 and 7 puts them inside a longer chain. Square and cube roots are on the Grade 8 geometry page. Equations are Pre-Algebra's whole subject. Scientific notation is the one genuinely not here yet.