Percentage Increase and Decrease Trick Worksheet
The fast method (One-step multiplier): Increase by p%: multiply by (100 + p)% — up 20% is × 1.2. Decrease by p%: multiply by (100 − p)% — down 25% is × 0.75. Easy way to multiply: × the whole number (115 or 75), then ÷ 100.
NameDateTime takenScore ___ / 40
- 1.388 decreased by 50% =
- 2.400 decreased by 12% =
- 3.480 increased by 35% =
- 4.112 decreased by 75% =
- 5.120 increased by 35% =
- 6.765 decreased by 60% =
- 7.685 increased by 20% =
- 8.615 increased by 60% =
- 9.700 decreased by 10% =
- 10.160 increased by 35% =
- 11.455 decreased by 20% =
- 12.215 decreased by 40% =
- 13.525 decreased by 8% =
- 14.170 increased by 10% =
- 15.800 increased by 35% =
- 16.580 decreased by 15% =
- 17.550 decreased by 8% =
- 18.550 increased by 10% =
- 19.120 increased by 40% =
- 20.340 increased by 5% =
- 21.475 increased by 20% =
- 22.720 increased by 75% =
- 23.300 increased by 5% =
- 24.60 increased by 30% =
- 25.120 increased by 35% =
- 26.150 increased by 30% =
- 27.55 increased by 60% =
- 28.300 decreased by 8% =
- 29.480 increased by 30% =
- 30.40 increased by 5% =
- 31.234 increased by 50% =
- 32.740 decreased by 15% =
- 33.40 increased by 30% =
- 34.170 decreased by 30% =
- 35.80 decreased by 5% =
- 36.430 increased by 20% =
- 37.435 increased by 40% =
- 38.340 increased by 15% =
- 39.40 decreased by 15% =
- 40.435 increased by 60% =
Answer key
- 194
- 352
- 648
- 28
- 162
- 306
- 822
- 984
- 630
- 216
- 364
- 129
- 483
- 187
- 1080
- 493
- 506
- 605
- 168
- 357
- 570
- 1260
- 315
- 78
- 162
- 195
- 88
- 276
- 624
- 42
- 351
- 629
- 52
- 119
- 76
- 516
- 609
- 391
- 34
- 696
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths