Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 892 · 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. 1.500 decreased by 8% =
2. 2.700 decreased by 35% =
3. 3.500 decreased by 10% =
4. 4.200 decreased by 12% =
5. 5.260 increased by 5% =
6. 6.784 increased by 25% =
7. 7.735 increased by 60% =
8. 8.396 increased by 75% =
9. 9.650 increased by 50% =
10. 10.76 increased by 75% =
11. 11.110 increased by 20% =
12. 12.750 increased by 8% =
13. 13.580 decreased by 35% =
14. 14.780 increased by 30% =
15. 15.230 increased by 10% =
16. 16.700 increased by 15% =
17. 17.720 decreased by 35% =
18. 18.400 decreased by 5% =
19. 19.550 increased by 8% =
20. 20.650 decreased by 8% =
21. 21.600 increased by 35% =
22. 22.128 increased by 25% =
23. 23.616 increased by 25% =
24. 24.325 increased by 12% =
25. 25.110 decreased by 30% =
26. 26.740 increased by 5% =
27. 27.140 increased by 35% =
28. 28.480 decreased by 30% =
29. 29.310 decreased by 40% =
30. 30.470 increased by 10% =
31. 31.100 decreased by 12% =
32. 32.600 decreased by 12% =
33. 33.590 increased by 30% =
34. 34.560 increased by 5% =
35. 35.70 increased by 30% =
36. 36.275 increased by 12% =
37. 37.775 decreased by 12% =
38. 38.525 decreased by 12% =
39. 39.70 increased by 30% =
40. 40.290 decreased by 20% =

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