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
- 1.725 increased by 20% =
- 2.76 increased by 75% =
- 3.560 increased by 15% =
- 4.680 increased by 5% =
- 5.400 increased by 5% =
- 6.780 increased by 15% =
- 7.575 decreased by 8% =
- 8.160 decreased by 35% =
- 9.400 increased by 25% =
- 10.780 increased by 75% =
- 11.125 increased by 60% =
- 12.430 decreased by 60% =
- 13.500 decreased by 35% =
- 14.625 increased by 12% =
- 15.160 decreased by 5% =
- 16.176 decreased by 25% =
- 17.260 increased by 5% =
- 18.156 decreased by 75% =
- 19.125 decreased by 60% =
- 20.460 decreased by 30% =
- 21.525 increased by 8% =
- 22.500 increased by 8% =
- 23.375 increased by 12% =
- 24.440 decreased by 10% =
- 25.785 decreased by 40% =
- 26.560 decreased by 15% =
- 27.115 decreased by 60% =
- 28.190 decreased by 60% =
- 29.520 increased by 25% =
- 30.70 increased by 20% =
- 31.480 decreased by 5% =
- 32.290 increased by 40% =
- 33.145 decreased by 40% =
- 34.540 increased by 10% =
- 35.375 decreased by 8% =
- 36.75 decreased by 20% =
- 37.200 decreased by 8% =
- 38.120 increased by 10% =
- 39.525 increased by 12% =
- 40.280 decreased by 35% =
Answer key
- 870
- 133
- 644
- 714
- 420
- 897
- 529
- 104
- 500
- 1365
- 200
- 172
- 325
- 700
- 152
- 132
- 273
- 39
- 50
- 322
- 567
- 540
- 420
- 396
- 471
- 476
- 46
- 76
- 650
- 84
- 456
- 406
- 87
- 594
- 345
- 60
- 184
- 132
- 588
- 182
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths