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
- 1.462 increased by 50% =
- 2.120 decreased by 35% =
- 3.485 decreased by 40% =
- 4.200 increased by 35% =
- 5.430 decreased by 60% =
- 6.555 decreased by 60% =
- 7.668 increased by 75% =
- 8.210 increased by 10% =
- 9.40 increased by 15% =
- 10.590 increased by 10% =
- 11.68 decreased by 75% =
- 12.780 increased by 5% =
- 13.692 increased by 75% =
- 14.100 increased by 60% =
- 15.275 increased by 12% =
- 16.320 decreased by 75% =
- 17.400 increased by 35% =
- 18.500 increased by 5% =
- 19.350 decreased by 12% =
- 20.425 decreased by 60% =
- 21.325 decreased by 12% =
- 22.540 increased by 5% =
- 23.332 decreased by 50% =
- 24.100 increased by 12% =
- 25.455 increased by 20% =
- 26.700 decreased by 40% =
- 27.680 decreased by 10% =
- 28.210 decreased by 40% =
- 29.250 increased by 20% =
- 30.600 decreased by 12% =
- 31.500 increased by 8% =
- 32.380 increased by 10% =
- 33.580 decreased by 35% =
- 34.380 decreased by 15% =
- 35.300 decreased by 15% =
- 36.792 decreased by 25% =
- 37.244 decreased by 75% =
- 38.550 decreased by 40% =
- 39.230 decreased by 10% =
- 40.332 decreased by 50% =
Answer key
- 693
- 78
- 291
- 270
- 172
- 222
- 1169
- 231
- 46
- 649
- 17
- 819
- 1211
- 160
- 308
- 80
- 540
- 525
- 308
- 170
- 286
- 567
- 166
- 112
- 546
- 420
- 612
- 126
- 300
- 528
- 540
- 418
- 377
- 323
- 255
- 594
- 61
- 330
- 207
- 166
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths