Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 819 · 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. 1.260 decreased by 10% =
2. 2.210 decreased by 20% =
3. 3.795 decreased by 40% =
4. 4.215 increased by 20% =
5. 5.602 increased by 50% =
6. 6.688 increased by 50% =
7. 7.595 increased by 40% =
8. 8.575 decreased by 8% =
9. 9.716 decreased by 25% =
10. 10.125 decreased by 40% =
11. 11.430 increased by 30% =
12. 12.52 increased by 50% =
13. 13.194 decreased by 50% =
14. 14.740 increased by 5% =
15. 15.80 decreased by 30% =
16. 16.600 decreased by 10% =
17. 17.770 increased by 20% =
18. 18.584 decreased by 75% =
19. 19.640 decreased by 5% =
20. 20.675 increased by 12% =
21. 21.750 decreased by 8% =
22. 22.600 increased by 5% =
23. 23.75 increased by 8% =
24. 24.650 decreased by 12% =
25. 25.115 increased by 40% =
26. 26.710 increased by 30% =
27. 27.150 increased by 12% =
28. 28.320 decreased by 30% =
29. 29.144 decreased by 75% =
30. 30.320 decreased by 35% =
31. 31.620 increased by 30% =
32. 32.700 increased by 12% =
33. 33.220 increased by 30% =
34. 34.500 decreased by 35% =
35. 35.585 decreased by 40% =
36. 36.560 increased by 10% =
37. 37.610 decreased by 20% =
38. 38.640 increased by 10% =
39. 39.320 increased by 15% =
40. 40.180 increased by 5% =

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