Math practice · reimagined
Percent change
Turn Percent change into a fight you actually want to win. Every problem is an attack — solve it faster than your opponent and you land the hit.
Ages 7–70 · no download · plays in your browser · 20 languages
How it works
Percent change
Pick a fighter, choose Percent change, and trust your numbers. The faster and cleaner you solve, the harder you hit — from gentle early grades all the way to Olympic-level challenges.
A discount is a percent taken OFF — it's the maths behind every sale sign in a shop.
First work out the percent of the price, then subtract it. For 20% off 80: a tenth of 80 is 8, so 20% is 16 — take that off and you pay 64. A handy shortcut: 20% off means you still pay 80% of the price, and 80% of 80 is also 64. Either road gets you there.
Find the part, take it away, and type what's left to pay.
More math to master
— Quick answers —
Percent change: the short FAQ
- Is the Percent change free to play?
- Yes. The Percent change is free to start right in your browser — no download, no signup. Paid plans later unlock the full fighter roster and the deeper curriculum.
- Who is the Percent change for?
- Anyone from 7 to 70. The early grades stay gentle for beginners, while the higher tiers will make even the confident sweat.
- Do I need to download anything to play the Percent change?
- Nope. The Percent change runs in any browser, and there's a mobile app on the same account if you'd rather train on your phone.
- Can the Percent change be used in the classroom?
- Absolutely. Teachers run the Percent change with a whole class and track who's improving — see the schools plan for per-student pricing and a teacher dashboard.