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
- 1.170 decreased by 20% =
- 2.720 decreased by 30% =
- 3.136 decreased by 75% =
- 4.175 increased by 8% =
- 5.490 decreased by 40% =
- 6.320 decreased by 10% =
- 7.700 increased by 5% =
- 8.80 decreased by 30% =
- 9.140 increased by 5% =
- 10.165 increased by 20% =
- 11.722 increased by 50% =
- 12.670 increased by 60% =
- 13.580 increased by 35% =
- 14.120 decreased by 25% =
- 15.375 increased by 8% =
- 16.700 increased by 15% =
- 17.120 increased by 20% =
- 18.220 increased by 10% =
- 19.40 increased by 30% =
- 20.380 decreased by 30% =
- 21.50 decreased by 30% =
- 22.240 decreased by 10% =
- 23.720 increased by 25% =
- 24.50 increased by 10% =
- 25.120 increased by 30% =
- 26.480 increased by 5% =
- 27.460 decreased by 25% =
- 28.376 decreased by 50% =
- 29.540 decreased by 60% =
- 30.170 increased by 40% =
- 31.670 increased by 10% =
- 32.335 decreased by 60% =
- 33.480 decreased by 5% =
- 34.300 increased by 15% =
- 35.620 decreased by 30% =
- 36.190 decreased by 60% =
- 37.435 increased by 60% =
- 38.80 increased by 35% =
- 39.80 increased by 30% =
- 40.720 decreased by 30% =
Answer key
- 136
- 504
- 34
- 189
- 294
- 288
- 735
- 56
- 147
- 198
- 1083
- 1072
- 783
- 90
- 405
- 805
- 144
- 242
- 52
- 266
- 35
- 216
- 900
- 55
- 156
- 504
- 345
- 188
- 216
- 238
- 737
- 134
- 456
- 345
- 434
- 76
- 696
- 108
- 104
- 504
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths