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
- 1.280 decreased by 30% =
- 2.300 decreased by 35% =
- 3.50 decreased by 8% =
- 4.620 increased by 5% =
- 5.320 decreased by 40% =
- 6.180 decreased by 15% =
- 7.402 decreased by 50% =
- 8.400 decreased by 15% =
- 9.60 decreased by 5% =
- 10.325 decreased by 12% =
- 11.270 increased by 30% =
- 12.580 increased by 10% =
- 13.200 decreased by 15% =
- 14.556 decreased by 75% =
- 15.345 increased by 20% =
- 16.800 decreased by 20% =
- 17.140 decreased by 25% =
- 18.200 decreased by 15% =
- 19.425 decreased by 12% =
- 20.140 increased by 15% =
- 21.120 decreased by 15% =
- 22.110 increased by 40% =
- 23.675 increased by 12% =
- 24.750 increased by 60% =
- 25.610 increased by 60% =
- 26.525 decreased by 8% =
- 27.670 increased by 30% =
- 28.540 decreased by 5% =
- 29.400 increased by 75% =
- 30.405 decreased by 20% =
- 31.770 decreased by 60% =
- 32.200 decreased by 8% =
- 33.60 increased by 75% =
- 34.425 increased by 12% =
- 35.600 decreased by 15% =
- 36.632 increased by 50% =
- 37.312 decreased by 75% =
- 38.385 decreased by 60% =
- 39.560 increased by 20% =
- 40.245 decreased by 60% =
Answer key
- 196
- 195
- 46
- 651
- 192
- 153
- 201
- 340
- 57
- 286
- 351
- 638
- 170
- 139
- 414
- 640
- 105
- 170
- 374
- 161
- 102
- 154
- 756
- 1200
- 976
- 483
- 871
- 513
- 700
- 324
- 308
- 184
- 105
- 476
- 510
- 948
- 78
- 154
- 672
- 98
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths