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
- 1.124 increased by 75% =
- 2.360 increased by 10% =
- 3.104 decreased by 25% =
- 4.312 increased by 25% =
- 5.80 increased by 30% =
- 6.225 increased by 12% =
- 7.580 increased by 15% =
- 8.125 decreased by 12% =
- 9.185 increased by 20% =
- 10.712 decreased by 25% =
- 11.252 increased by 25% =
- 12.280 increased by 35% =
- 13.550 decreased by 8% =
- 14.780 decreased by 25% =
- 15.80 increased by 15% =
- 16.540 decreased by 60% =
- 17.84 increased by 75% =
- 18.385 decreased by 40% =
- 19.96 decreased by 25% =
- 20.275 decreased by 12% =
- 21.780 decreased by 15% =
- 22.525 decreased by 12% =
- 23.800 decreased by 12% =
- 24.670 decreased by 50% =
- 25.480 decreased by 20% =
- 26.230 increased by 10% =
- 27.756 increased by 50% =
- 28.388 decreased by 75% =
- 29.75 decreased by 40% =
- 30.520 decreased by 35% =
- 31.240 increased by 30% =
- 32.560 decreased by 15% =
- 33.80 increased by 5% =
- 34.98 increased by 50% =
- 35.200 increased by 12% =
- 36.80 increased by 15% =
- 37.380 increased by 15% =
- 38.425 decreased by 8% =
- 39.130 increased by 20% =
- 40.60 increased by 15% =
Answer key
- 217
- 396
- 78
- 390
- 104
- 252
- 667
- 110
- 222
- 534
- 315
- 378
- 506
- 585
- 92
- 216
- 147
- 231
- 72
- 242
- 663
- 462
- 704
- 335
- 384
- 253
- 1134
- 97
- 45
- 338
- 312
- 476
- 84
- 147
- 224
- 92
- 437
- 391
- 156
- 69
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths