Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 591 · 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. 1.50 decreased by 10% =
2. 2.660 increased by 60% =
3. 3.540 increased by 25% =
4. 4.526 increased by 50% =
5. 5.530 increased by 30% =
6. 6.800 increased by 15% =
7. 7.312 increased by 75% =
8. 8.440 decreased by 5% =
9. 9.260 increased by 35% =
10. 10.455 decreased by 60% =
11. 11.236 decreased by 75% =
12. 12.112 decreased by 25% =
13. 13.136 decreased by 50% =
14. 14.110 decreased by 30% =
15. 15.725 decreased by 12% =
16. 16.780 increased by 30% =
17. 17.600 increased by 5% =
18. 18.216 decreased by 75% =
19. 19.455 increased by 60% =
20. 20.476 decreased by 25% =
21. 21.760 decreased by 15% =
22. 22.148 increased by 25% =
23. 23.210 increased by 10% =
24. 24.180 decreased by 5% =
25. 25.348 decreased by 25% =
26. 26.580 increased by 15% =
27. 27.408 increased by 75% =
28. 28.316 increased by 25% =
29. 29.70 decreased by 20% =
30. 30.230 decreased by 40% =
31. 31.400 increased by 15% =
32. 32.60 decreased by 30% =
33. 33.360 increased by 35% =
34. 34.670 increased by 30% =
35. 35.112 decreased by 25% =
36. 36.690 decreased by 10% =
37. 37.600 decreased by 5% =
38. 38.140 decreased by 35% =
39. 39.720 increased by 5% =
40. 40.220 increased by 50% =

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