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
- 1.306 decreased by 50% =
- 2.640 decreased by 15% =
- 3.792 decreased by 25% =
- 4.50 decreased by 10% =
- 5.70 increased by 10% =
- 6.356 decreased by 25% =
- 7.325 decreased by 60% =
- 8.460 increased by 30% =
- 9.715 increased by 40% =
- 10.140 decreased by 10% =
- 11.40 decreased by 15% =
- 12.400 decreased by 30% =
- 13.445 increased by 40% =
- 14.245 decreased by 20% =
- 15.710 decreased by 60% =
- 16.548 increased by 75% =
- 17.440 decreased by 75% =
- 18.470 decreased by 10% =
- 19.425 decreased by 12% =
- 20.550 increased by 50% =
- 21.780 increased by 5% =
- 22.210 increased by 10% =
- 23.500 increased by 35% =
- 24.666 decreased by 50% =
- 25.492 increased by 75% =
- 26.180 decreased by 15% =
- 27.100 decreased by 12% =
- 28.440 increased by 50% =
- 29.698 increased by 50% =
- 30.215 increased by 60% =
- 31.500 decreased by 5% =
- 32.390 increased by 50% =
- 33.156 decreased by 75% =
- 34.790 decreased by 40% =
- 35.200 increased by 8% =
- 36.345 decreased by 20% =
- 37.410 decreased by 50% =
- 38.440 increased by 5% =
- 39.200 decreased by 30% =
- 40.500 increased by 5% =
Answer key
- 153
- 544
- 594
- 45
- 77
- 267
- 130
- 598
- 1001
- 126
- 34
- 280
- 623
- 196
- 284
- 959
- 110
- 423
- 374
- 825
- 819
- 231
- 675
- 333
- 861
- 153
- 88
- 660
- 1047
- 344
- 475
- 585
- 39
- 474
- 216
- 276
- 205
- 462
- 140
- 525
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths