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
- 1.455 decreased by 60% =
- 2.240 decreased by 5% =
- 3.700 increased by 15% =
- 4.515 decreased by 60% =
- 5.500 decreased by 10% =
- 6.280 decreased by 35% =
- 7.195 increased by 40% =
- 8.220 increased by 50% =
- 9.612 decreased by 25% =
- 10.484 increased by 50% =
- 11.500 decreased by 8% =
- 12.305 increased by 20% =
- 13.235 decreased by 40% =
- 14.220 decreased by 75% =
- 15.70 increased by 10% =
- 16.720 decreased by 20% =
- 17.555 decreased by 40% =
- 18.75 decreased by 60% =
- 19.760 increased by 10% =
- 20.240 increased by 10% =
- 21.780 decreased by 30% =
- 22.204 decreased by 75% =
- 23.740 decreased by 15% =
- 24.480 increased by 5% =
- 25.312 decreased by 50% =
- 26.550 increased by 12% =
- 27.540 increased by 15% =
- 28.145 decreased by 20% =
- 29.125 increased by 12% =
- 30.790 increased by 40% =
- 31.590 decreased by 40% =
- 32.75 decreased by 12% =
- 33.156 decreased by 25% =
- 34.720 increased by 10% =
- 35.115 decreased by 60% =
- 36.55 decreased by 20% =
- 37.540 increased by 5% =
- 38.675 increased by 12% =
- 39.615 increased by 60% =
- 40.276 decreased by 75% =
Answer key
- 182
- 228
- 805
- 206
- 450
- 182
- 273
- 330
- 459
- 726
- 460
- 366
- 141
- 55
- 77
- 576
- 333
- 30
- 836
- 264
- 546
- 51
- 629
- 504
- 156
- 616
- 621
- 116
- 140
- 1106
- 354
- 66
- 117
- 792
- 46
- 44
- 567
- 756
- 984
- 69
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths