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
- 1.40 decreased by 25% =
- 2.524 decreased by 25% =
- 3.725 increased by 60% =
- 4.220 increased by 5% =
- 5.580 increased by 35% =
- 6.80 decreased by 5% =
- 7.540 increased by 5% =
- 8.660 increased by 35% =
- 9.580 decreased by 35% =
- 10.175 decreased by 12% =
- 11.425 decreased by 12% =
- 12.320 decreased by 25% =
- 13.640 increased by 60% =
- 14.515 decreased by 60% =
- 15.280 increased by 25% =
- 16.40 decreased by 15% =
- 17.400 decreased by 12% =
- 18.265 decreased by 40% =
- 19.140 increased by 60% =
- 20.370 decreased by 20% =
- 21.465 decreased by 60% =
- 22.340 decreased by 15% =
- 23.492 increased by 25% =
- 24.185 increased by 20% =
- 25.435 increased by 40% =
- 26.180 decreased by 15% =
- 27.60 decreased by 60% =
- 28.400 decreased by 35% =
- 29.690 increased by 30% =
- 30.790 decreased by 10% =
- 31.40 increased by 35% =
- 32.430 decreased by 10% =
- 33.170 decreased by 10% =
- 34.760 decreased by 25% =
- 35.195 increased by 60% =
- 36.252 decreased by 50% =
- 37.90 decreased by 20% =
- 38.452 increased by 75% =
- 39.680 decreased by 5% =
- 40.750 increased by 12% =
Answer key
- 30
- 393
- 1160
- 231
- 783
- 76
- 567
- 891
- 377
- 154
- 374
- 240
- 1024
- 206
- 350
- 34
- 352
- 159
- 224
- 296
- 186
- 289
- 615
- 222
- 609
- 153
- 24
- 260
- 897
- 711
- 54
- 387
- 153
- 570
- 312
- 126
- 72
- 791
- 646
- 840
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths