Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 70 · 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. 1.240 increased by 15% =
2. 2.260 increased by 60% =
3. 3.150 increased by 30% =
4. 4.224 increased by 75% =
5. 5.650 increased by 10% =
6. 6.80 decreased by 35% =
7. 7.760 increased by 15% =
8. 8.325 decreased by 12% =
9. 9.60 increased by 5% =
10. 10.330 increased by 60% =
11. 11.220 increased by 5% =
12. 12.740 increased by 5% =
13. 13.95 increased by 20% =
14. 14.460 increased by 5% =
15. 15.670 decreased by 60% =
16. 16.120 decreased by 35% =
17. 17.640 decreased by 30% =
18. 18.335 decreased by 40% =
19. 19.640 increased by 15% =
20. 20.460 increased by 5% =
21. 21.800 increased by 30% =
22. 22.650 increased by 8% =
23. 23.800 increased by 12% =
24. 24.45 decreased by 40% =
25. 25.150 increased by 8% =
26. 26.650 increased by 8% =
27. 27.260 decreased by 30% =
28. 28.345 increased by 60% =
29. 29.492 increased by 50% =
30. 30.770 decreased by 10% =
31. 31.176 increased by 25% =
32. 32.625 increased by 40% =
33. 33.624 increased by 25% =
34. 34.340 decreased by 50% =
35. 35.355 decreased by 40% =
36. 36.350 increased by 12% =
37. 37.750 increased by 10% =
38. 38.365 increased by 40% =
39. 39.576 increased by 25% =
40. 40.550 decreased by 30% =

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