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
- 1.715 increased by 60% =
- 2.340 decreased by 10% =
- 3.240 decreased by 35% =
- 4.500 decreased by 15% =
- 5.488 increased by 50% =
- 6.475 decreased by 20% =
- 7.80 decreased by 10% =
- 8.790 decreased by 20% =
- 9.148 decreased by 25% =
- 10.450 increased by 8% =
- 11.736 decreased by 75% =
- 12.96 decreased by 75% =
- 13.260 decreased by 25% =
- 14.68 increased by 75% =
- 15.450 decreased by 8% =
- 16.432 decreased by 50% =
- 17.375 increased by 12% =
- 18.460 decreased by 5% =
- 19.330 increased by 30% =
- 20.50 increased by 8% =
- 21.200 decreased by 30% =
- 22.452 decreased by 75% =
- 23.725 decreased by 20% =
- 24.40 decreased by 5% =
- 25.60 decreased by 30% =
- 26.310 increased by 60% =
- 27.160 decreased by 15% =
- 28.360 increased by 15% =
- 29.570 decreased by 10% =
- 30.40 decreased by 15% =
- 31.40 increased by 15% =
- 32.495 increased by 20% =
- 33.628 decreased by 25% =
- 34.504 increased by 75% =
- 35.380 decreased by 5% =
- 36.320 decreased by 30% =
- 37.140 increased by 15% =
- 38.800 increased by 35% =
- 39.544 increased by 25% =
- 40.780 increased by 5% =
Answer key
- 1144
- 306
- 156
- 425
- 732
- 380
- 72
- 632
- 111
- 486
- 184
- 24
- 195
- 119
- 414
- 216
- 420
- 437
- 429
- 54
- 140
- 113
- 580
- 38
- 42
- 496
- 136
- 414
- 513
- 34
- 46
- 594
- 471
- 882
- 361
- 224
- 161
- 1080
- 680
- 819
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths