Percentages — Mental Math

Build mental agility with timed percentage problems. Start with accuracy, then increase speed as you improve.

Skills you’ll practice

Estimation, rounding, and fraction‑percent equivalences
Rapid mental calculation under gentle time pressure
Consistent recall through spaced, short sessions

Common percentage patterns

10% of N = N ÷ 10, 5% = 10% ÷ 2, 1% = N ÷ 100
Increase/Decrease: New = Old × (1 ± p/100)
Reverse: Part is p% of Whole ⇒ Whole = Part × 100 / p

Training tips

Speak intermediate values in your head to stabilize focus
Prefer accurate steps first; speed comes naturally with practice
Mix easy/medium/hard for variety and challenge

Play Percentages now or learn more about our approach.