Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 768 · 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. 1.300 decreased by 20% =
2. 2.75 decreased by 8% =
3. 3.680 decreased by 5% =
4. 4.360 decreased by 15% =
5. 5.105 decreased by 20% =
6. 6.800 increased by 12% =
7. 7.460 increased by 5% =
8. 8.405 increased by 60% =
9. 9.650 increased by 30% =
10. 10.180 increased by 20% =
11. 11.760 increased by 10% =
12. 12.260 decreased by 35% =
13. 13.384 decreased by 50% =
14. 14.775 increased by 8% =
15. 15.260 decreased by 10% =
16. 16.410 increased by 30% =
17. 17.120 decreased by 5% =
18. 18.60 decreased by 15% =
19. 19.632 increased by 25% =
20. 20.748 decreased by 25% =
21. 21.310 decreased by 40% =
22. 22.460 decreased by 10% =
23. 23.80 increased by 15% =
24. 24.50 increased by 12% =
25. 25.760 increased by 10% =
26. 26.680 increased by 50% =
27. 27.530 decreased by 40% =
28. 28.648 increased by 25% =
29. 29.435 increased by 20% =
30. 30.420 increased by 15% =
31. 31.204 increased by 25% =
32. 32.470 decreased by 30% =
33. 33.475 decreased by 8% =
34. 34.285 increased by 60% =
35. 35.380 decreased by 5% =
36. 36.770 decreased by 10% =
37. 37.700 decreased by 10% =
38. 38.334 decreased by 50% =
39. 39.80 decreased by 75% =
40. 40.174 increased by 50% =

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