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
- 1.125 decreased by 40% =
- 2.720 decreased by 15% =
- 3.604 increased by 25% =
- 4.140 increased by 15% =
- 5.294 increased by 50% =
- 6.60 increased by 10% =
- 7.390 increased by 60% =
- 8.725 increased by 40% =
- 9.280 decreased by 35% =
- 10.175 decreased by 12% =
- 11.110 decreased by 30% =
- 12.460 decreased by 10% =
- 13.370 decreased by 10% =
- 14.235 increased by 20% =
- 15.725 increased by 12% =
- 16.260 decreased by 30% =
- 17.160 increased by 40% =
- 18.56 increased by 75% =
- 19.600 decreased by 60% =
- 20.50 increased by 30% =
- 21.500 increased by 8% =
- 22.350 decreased by 12% =
- 23.120 increased by 60% =
- 24.560 increased by 35% =
- 25.600 increased by 20% =
- 26.200 increased by 5% =
- 27.600 increased by 8% =
- 28.532 decreased by 75% =
- 29.410 increased by 30% =
- 30.540 increased by 5% =
- 31.592 decreased by 75% =
- 32.208 decreased by 75% =
- 33.580 increased by 15% =
- 34.110 decreased by 20% =
- 35.780 decreased by 35% =
- 36.130 decreased by 60% =
- 37.530 decreased by 30% =
- 38.150 increased by 10% =
- 39.640 increased by 10% =
- 40.775 increased by 8% =
Answer key
- 75
- 612
- 755
- 161
- 441
- 66
- 624
- 1015
- 182
- 154
- 77
- 414
- 333
- 282
- 812
- 182
- 224
- 98
- 240
- 65
- 540
- 308
- 192
- 756
- 720
- 210
- 648
- 133
- 533
- 567
- 148
- 52
- 667
- 88
- 507
- 52
- 371
- 165
- 704
- 837
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths