Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 230 · 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. 1.764 increased by 75% =
2. 2.360 increased by 5% =
3. 3.260 increased by 15% =
4. 4.180 decreased by 10% =
5. 5.325 increased by 8% =
6. 6.80 increased by 30% =
7. 7.108 increased by 25% =
8. 8.680 increased by 10% =
9. 9.40 decreased by 5% =
10. 10.205 increased by 20% =
11. 11.572 decreased by 25% =
12. 12.204 increased by 25% =
13. 13.335 increased by 40% =
14. 14.740 decreased by 25% =
15. 15.560 decreased by 10% =
16. 16.162 increased by 50% =
17. 17.195 increased by 20% =
18. 18.480 decreased by 30% =
19. 19.675 increased by 8% =
20. 20.160 decreased by 30% =
21. 21.270 decreased by 60% =
22. 22.90 decreased by 30% =
23. 23.108 increased by 75% =
24. 24.525 increased by 12% =
25. 25.240 decreased by 10% =
26. 26.540 decreased by 5% =
27. 27.240 increased by 50% =
28. 28.464 increased by 50% =
29. 29.620 increased by 35% =
30. 30.150 decreased by 12% =
31. 31.740 increased by 30% =
32. 32.435 decreased by 60% =
33. 33.135 increased by 20% =
34. 34.516 increased by 25% =
35. 35.500 decreased by 5% =
36. 36.440 decreased by 25% =
37. 37.254 increased by 50% =
38. 38.760 decreased by 10% =
39. 39.775 increased by 12% =
40. 40.224 increased by 75% =

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