Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 675 · 40 questions

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.

1. 1.340 decreased by 15% =
2. 2.50 increased by 20% =
3. 3.375 increased by 12% =
4. 4.470 decreased by 60% =
5. 5.685 increased by 60% =
6. 6.555 increased by 20% =
7. 7.618 increased by 50% =
8. 8.260 decreased by 40% =
9. 9.635 decreased by 40% =
10. 10.440 increased by 10% =
11. 11.450 decreased by 12% =
12. 12.680 increased by 35% =
13. 13.280 decreased by 30% =
14. 14.760 decreased by 15% =
15. 15.120 decreased by 30% =
16. 16.730 increased by 10% =
17. 17.750 decreased by 10% =
18. 18.650 increased by 20% =
19. 19.400 decreased by 35% =
20. 20.80 decreased by 35% =
21. 21.310 decreased by 20% =
22. 22.745 decreased by 20% =
23. 23.736 increased by 75% =
24. 24.492 decreased by 25% =
25. 25.492 increased by 25% =
26. 26.625 increased by 8% =
27. 27.420 increased by 35% =
28. 28.590 decreased by 40% =
29. 29.740 increased by 20% =
30. 30.675 decreased by 60% =
31. 31.550 decreased by 12% =
32. 32.340 decreased by 5% =
33. 33.150 decreased by 8% =
34. 34.220 increased by 15% =
35. 35.510 increased by 20% =
36. 36.650 increased by 12% =
37. 37.225 decreased by 12% =
38. 38.300 increased by 10% =
39. 39.155 decreased by 40% =
40. 40.315 increased by 20% =

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