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
- 1.720 decreased by 35% =
- 2.240 decreased by 35% =
- 3.775 decreased by 60% =
- 4.92 decreased by 75% =
- 5.220 increased by 15% =
- 6.160 increased by 25% =
- 7.458 decreased by 50% =
- 8.780 decreased by 15% =
- 9.75 increased by 8% =
- 10.50 increased by 12% =
- 11.140 decreased by 35% =
- 12.340 decreased by 5% =
- 13.655 increased by 60% =
- 14.380 increased by 75% =
- 15.100 decreased by 12% =
- 16.50 increased by 12% =
- 17.556 decreased by 75% =
- 18.200 increased by 30% =
- 19.765 decreased by 20% =
- 20.200 decreased by 40% =
- 21.380 decreased by 10% =
- 22.728 decreased by 75% =
- 23.100 increased by 10% =
- 24.680 decreased by 25% =
- 25.475 decreased by 12% =
- 26.150 decreased by 30% =
- 27.40 decreased by 5% =
- 28.530 increased by 10% =
- 29.532 increased by 75% =
- 30.45 increased by 40% =
- 31.376 increased by 75% =
- 32.520 increased by 15% =
- 33.450 increased by 12% =
- 34.400 decreased by 35% =
- 35.180 decreased by 15% =
- 36.40 decreased by 40% =
- 37.60 increased by 30% =
- 38.695 increased by 20% =
- 39.750 increased by 30% =
- 40.510 decreased by 10% =
Answer key
- 468
- 156
- 310
- 23
- 253
- 200
- 229
- 663
- 81
- 56
- 91
- 323
- 1048
- 665
- 88
- 56
- 139
- 260
- 612
- 120
- 342
- 182
- 110
- 510
- 418
- 105
- 38
- 583
- 931
- 63
- 658
- 598
- 504
- 260
- 153
- 24
- 78
- 834
- 975
- 459
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths