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
- 1.460 decreased by 60% =
- 2.245 decreased by 40% =
- 3.150 increased by 8% =
- 4.752 decreased by 75% =
- 5.340 decreased by 20% =
- 6.290 decreased by 20% =
- 7.80 increased by 5% =
- 8.150 increased by 60% =
- 9.115 decreased by 60% =
- 10.230 decreased by 10% =
- 11.85 increased by 60% =
- 12.570 decreased by 20% =
- 13.598 increased by 50% =
- 14.592 decreased by 25% =
- 15.580 increased by 15% =
- 16.700 decreased by 5% =
- 17.246 increased by 50% =
- 18.765 increased by 40% =
- 19.300 increased by 5% =
- 20.544 decreased by 75% =
- 21.430 decreased by 40% =
- 22.244 increased by 25% =
- 23.520 decreased by 35% =
- 24.750 decreased by 12% =
- 25.330 decreased by 60% =
- 26.480 decreased by 75% =
- 27.75 decreased by 8% =
- 28.610 increased by 50% =
- 29.492 decreased by 25% =
- 30.100 increased by 5% =
- 31.80 decreased by 75% =
- 32.172 increased by 75% =
- 33.450 increased by 60% =
- 34.200 increased by 5% =
- 35.168 decreased by 75% =
- 36.320 decreased by 20% =
- 37.730 decreased by 30% =
- 38.500 increased by 10% =
- 39.535 increased by 20% =
- 40.530 increased by 10% =
Answer key
- 184
- 147
- 162
- 188
- 272
- 232
- 84
- 240
- 46
- 207
- 136
- 456
- 897
- 444
- 667
- 665
- 369
- 1071
- 315
- 136
- 258
- 305
- 338
- 660
- 132
- 120
- 69
- 915
- 369
- 105
- 20
- 301
- 720
- 210
- 42
- 256
- 511
- 550
- 642
- 583
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths