Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 410 · 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. 1.480 increased by 30% =
2. 2.100 increased by 12% =
3. 3.700 increased by 75% =
4. 4.400 decreased by 12% =
5. 5.592 increased by 75% =
6. 6.102 increased by 50% =
7. 7.550 decreased by 12% =
8. 8.50 decreased by 20% =
9. 9.760 decreased by 15% =
10. 10.196 decreased by 25% =
11. 11.180 increased by 60% =
12. 12.660 decreased by 10% =
13. 13.290 decreased by 50% =
14. 14.180 decreased by 15% =
15. 15.350 increased by 8% =
16. 16.625 decreased by 40% =
17. 17.150 increased by 60% =
18. 18.465 increased by 40% =
19. 19.80 increased by 25% =
20. 20.705 decreased by 40% =
21. 21.110 increased by 30% =
22. 22.450 decreased by 60% =
23. 23.60 increased by 15% =
24. 24.380 decreased by 20% =
25. 25.756 increased by 75% =
26. 26.530 decreased by 10% =
27. 27.400 increased by 40% =
28. 28.680 increased by 35% =
29. 29.110 decreased by 30% =
30. 30.146 decreased by 50% =
31. 31.385 decreased by 60% =
32. 32.375 decreased by 60% =
33. 33.212 decreased by 75% =
34. 34.440 decreased by 15% =
35. 35.640 decreased by 60% =
36. 36.800 decreased by 12% =
37. 37.760 increased by 5% =
38. 38.140 increased by 5% =
39. 39.735 decreased by 20% =
40. 40.775 increased by 12% =

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