Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 368 · 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. 1.120 decreased by 35% =
2. 2.240 increased by 5% =
3. 3.50 increased by 12% =
4. 4.440 increased by 5% =
5. 5.280 increased by 60% =
6. 6.344 decreased by 25% =
7. 7.60 increased by 5% =
8. 8.105 decreased by 20% =
9. 9.330 increased by 60% =
10. 10.135 increased by 60% =
11. 11.720 increased by 10% =
12. 12.260 increased by 15% =
13. 13.75 decreased by 12% =
14. 14.210 increased by 30% =
15. 15.340 increased by 10% =
16. 16.740 increased by 15% =
17. 17.588 increased by 25% =
18. 18.120 increased by 50% =
19. 19.675 decreased by 8% =
20. 20.60 increased by 5% =
21. 21.75 decreased by 60% =
22. 22.80 increased by 10% =
23. 23.225 decreased by 12% =
24. 24.90 increased by 60% =
25. 25.380 increased by 40% =
26. 26.220 decreased by 35% =
27. 27.800 decreased by 5% =
28. 28.415 increased by 20% =
29. 29.300 decreased by 15% =
30. 30.470 increased by 30% =
31. 31.150 decreased by 12% =
32. 32.480 decreased by 5% =
33. 33.326 increased by 50% =
34. 34.510 increased by 50% =
35. 35.300 increased by 35% =
36. 36.220 decreased by 5% =
37. 37.714 decreased by 50% =
38. 38.140 increased by 30% =
39. 39.280 increased by 5% =
40. 40.460 increased by 15% =

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