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
- 1.780 increased by 10% =
- 2.400 decreased by 5% =
- 3.435 increased by 40% =
- 4.235 increased by 40% =
- 5.130 decreased by 30% =
- 6.60 increased by 35% =
- 7.200 decreased by 5% =
- 8.500 increased by 75% =
- 9.350 increased by 12% =
- 10.420 decreased by 35% =
- 11.655 increased by 60% =
- 12.60 decreased by 35% =
- 13.312 decreased by 75% =
- 14.300 increased by 15% =
- 15.300 decreased by 35% =
- 16.746 decreased by 50% =
- 17.250 increased by 12% =
- 18.280 increased by 10% =
- 19.695 decreased by 40% =
- 20.310 decreased by 60% =
- 21.405 decreased by 40% =
- 22.326 increased by 50% =
- 23.340 increased by 15% =
- 24.340 decreased by 30% =
- 25.410 decreased by 10% =
- 26.600 increased by 12% =
- 27.700 increased by 30% =
- 28.400 decreased by 35% =
- 29.240 decreased by 10% =
- 30.600 increased by 75% =
- 31.80 decreased by 35% =
- 32.728 decreased by 50% =
- 33.240 increased by 60% =
- 34.720 decreased by 25% =
- 35.240 increased by 30% =
- 36.100 increased by 8% =
- 37.210 increased by 50% =
- 38.80 decreased by 10% =
- 39.625 increased by 12% =
- 40.400 increased by 12% =
Answer key
- 858
- 380
- 609
- 329
- 91
- 81
- 190
- 875
- 392
- 273
- 1048
- 39
- 78
- 345
- 195
- 373
- 280
- 308
- 417
- 124
- 243
- 489
- 391
- 238
- 369
- 672
- 910
- 260
- 216
- 1050
- 52
- 364
- 384
- 540
- 312
- 108
- 315
- 72
- 700
- 448
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths