Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 53 · 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. 1.160 decreased by 5% =
2. 2.72 increased by 75% =
3. 3.625 increased by 20% =
4. 4.560 increased by 10% =
5. 5.560 decreased by 60% =
6. 6.660 decreased by 15% =
7. 7.605 decreased by 20% =
8. 8.490 increased by 60% =
9. 9.500 decreased by 15% =
10. 10.495 decreased by 60% =
11. 11.510 decreased by 60% =
12. 12.520 decreased by 30% =
13. 13.425 increased by 60% =
14. 14.270 decreased by 40% =
15. 15.720 decreased by 5% =
16. 16.445 increased by 40% =
17. 17.44 decreased by 50% =
18. 18.632 increased by 75% =
19. 19.680 decreased by 15% =
20. 20.520 increased by 10% =
21. 21.585 increased by 60% =
22. 22.428 increased by 50% =
23. 23.150 decreased by 40% =
24. 24.160 increased by 15% =
25. 25.765 decreased by 40% =
26. 26.260 decreased by 5% =
27. 27.680 decreased by 35% =
28. 28.720 increased by 5% =
29. 29.640 decreased by 15% =
30. 30.800 increased by 35% =
31. 31.490 decreased by 40% =
32. 32.640 decreased by 15% =
33. 33.148 decreased by 50% =
34. 34.40 increased by 15% =
35. 35.60 increased by 5% =
36. 36.575 increased by 12% =
37. 37.560 increased by 35% =
38. 38.605 increased by 60% =
39. 39.100 increased by 15% =
40. 40.740 decreased by 5% =

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