Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 153 · 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. 1.325 decreased by 8% =
2. 2.405 decreased by 60% =
3. 3.260 decreased by 5% =
4. 4.465 decreased by 20% =
5. 5.430 increased by 30% =
6. 6.400 increased by 35% =
7. 7.80 increased by 5% =
8. 8.50 increased by 12% =
9. 9.300 decreased by 12% =
10. 10.70 increased by 40% =
11. 11.525 decreased by 8% =
12. 12.574 decreased by 50% =
13. 13.760 decreased by 5% =
14. 14.435 decreased by 40% =
15. 15.160 decreased by 60% =
16. 16.220 increased by 35% =
17. 17.80 increased by 60% =
18. 18.40 increased by 5% =
19. 19.240 decreased by 30% =
20. 20.570 increased by 50% =
21. 21.186 decreased by 50% =
22. 22.480 decreased by 5% =
23. 23.675 decreased by 12% =
24. 24.330 decreased by 20% =
25. 25.580 increased by 25% =
26. 26.140 decreased by 5% =
27. 27.705 increased by 60% =
28. 28.785 decreased by 60% =
29. 29.136 decreased by 50% =
30. 30.450 decreased by 20% =
31. 31.325 increased by 12% =
32. 32.740 increased by 35% =
33. 33.670 increased by 10% =
34. 34.248 increased by 25% =
35. 35.300 decreased by 15% =
36. 36.180 decreased by 20% =
37. 37.356 decreased by 25% =
38. 38.100 increased by 10% =
39. 39.532 increased by 25% =
40. 40.572 decreased by 25% =

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