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
- 1.360 decreased by 30% =
- 2.320 decreased by 5% =
- 3.740 increased by 15% =
- 4.640 increased by 15% =
- 5.160 increased by 25% =
- 6.400 increased by 15% =
- 7.268 decreased by 75% =
- 8.160 decreased by 20% =
- 9.175 decreased by 12% =
- 10.80 decreased by 35% =
- 11.152 increased by 75% =
- 12.785 increased by 60% =
- 13.192 decreased by 75% =
- 14.400 increased by 35% =
- 15.480 decreased by 15% =
- 16.125 decreased by 8% =
- 17.140 decreased by 25% =
- 18.428 increased by 75% =
- 19.430 decreased by 10% =
- 20.212 increased by 25% =
- 21.295 increased by 40% =
- 22.605 decreased by 60% =
- 23.688 decreased by 25% =
- 24.670 increased by 30% =
- 25.76 increased by 25% =
- 26.225 increased by 8% =
- 27.760 increased by 30% =
- 28.352 decreased by 50% =
- 29.480 increased by 35% =
- 30.730 decreased by 30% =
- 31.760 increased by 5% =
- 32.50 increased by 40% =
- 33.600 increased by 8% =
- 34.240 increased by 15% =
- 35.180 decreased by 50% =
- 36.500 decreased by 60% =
- 37.725 decreased by 8% =
- 38.480 increased by 5% =
- 39.680 increased by 5% =
- 40.120 increased by 20% =
Answer key
- 252
- 304
- 851
- 736
- 200
- 460
- 67
- 128
- 154
- 52
- 266
- 1256
- 48
- 540
- 408
- 115
- 105
- 749
- 387
- 265
- 413
- 242
- 516
- 871
- 95
- 243
- 988
- 176
- 648
- 511
- 798
- 70
- 648
- 276
- 90
- 200
- 667
- 504
- 714
- 144
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths