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
- 1.340 decreased by 10% =
- 2.700 decreased by 8% =
- 3.740 decreased by 10% =
- 4.375 increased by 20% =
- 5.280 increased by 35% =
- 6.45 decreased by 60% =
- 7.215 increased by 60% =
- 8.440 increased by 5% =
- 9.488 decreased by 75% =
- 10.120 increased by 25% =
- 11.680 increased by 15% =
- 12.260 increased by 25% =
- 13.160 decreased by 35% =
- 14.710 decreased by 10% =
- 15.80 increased by 15% =
- 16.60 decreased by 30% =
- 17.510 increased by 30% =
- 18.375 decreased by 12% =
- 19.620 decreased by 5% =
- 20.160 decreased by 15% =
- 21.180 increased by 5% =
- 22.460 increased by 35% =
- 23.290 increased by 30% =
- 24.124 decreased by 25% =
- 25.690 increased by 60% =
- 26.700 decreased by 8% =
- 27.570 increased by 30% =
- 28.225 increased by 8% =
- 29.375 decreased by 8% =
- 30.660 decreased by 40% =
- 31.520 decreased by 15% =
- 32.520 increased by 15% =
- 33.170 decreased by 20% =
- 34.640 increased by 25% =
- 35.744 decreased by 75% =
- 36.320 decreased by 5% =
- 37.640 increased by 60% =
- 38.405 decreased by 40% =
- 39.480 decreased by 15% =
- 40.525 decreased by 12% =
Answer key
- 306
- 644
- 666
- 450
- 378
- 18
- 344
- 462
- 122
- 150
- 782
- 325
- 104
- 639
- 92
- 42
- 663
- 330
- 589
- 136
- 189
- 621
- 377
- 93
- 1104
- 644
- 741
- 243
- 345
- 396
- 442
- 598
- 136
- 800
- 186
- 304
- 1024
- 243
- 408
- 462
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths