Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 872 · 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. 1.520 decreased by 5% =
2. 2.300 decreased by 35% =
3. 3.550 increased by 8% =
4. 4.335 increased by 20% =
5. 5.376 decreased by 25% =
6. 6.672 increased by 75% =
7. 7.240 decreased by 5% =
8. 8.625 decreased by 20% =
9. 9.475 increased by 8% =
10. 10.380 increased by 5% =
11. 11.235 increased by 40% =
12. 12.510 increased by 30% =
13. 13.225 decreased by 12% =
14. 14.205 decreased by 20% =
15. 15.560 decreased by 5% =
16. 16.185 decreased by 40% =
17. 17.358 increased by 50% =
18. 18.530 decreased by 50% =
19. 19.510 decreased by 60% =
20. 20.225 increased by 60% =
21. 21.775 decreased by 12% =
22. 22.64 decreased by 50% =
23. 23.390 increased by 50% =
24. 24.170 increased by 60% =
25. 25.762 decreased by 50% =
26. 26.700 increased by 30% =
27. 27.525 decreased by 12% =
28. 28.140 increased by 15% =
29. 29.200 increased by 15% =
30. 30.365 increased by 60% =
31. 31.220 increased by 15% =
32. 32.70 increased by 30% =
33. 33.330 increased by 10% =
34. 34.728 decreased by 25% =
35. 35.100 increased by 15% =
36. 36.355 decreased by 20% =
37. 37.475 decreased by 8% =
38. 38.460 increased by 5% =
39. 39.525 increased by 8% =
40. 40.40 increased by 5% =

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