Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 149 · 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. 1.730 increased by 20% =
2. 2.225 decreased by 8% =
3. 3.270 decreased by 10% =
4. 4.680 increased by 35% =
5. 5.780 increased by 15% =
6. 6.780 increased by 15% =
7. 7.800 decreased by 15% =
8. 8.670 decreased by 20% =
9. 9.50 decreased by 10% =
10. 10.500 decreased by 20% =
11. 11.472 increased by 75% =
12. 12.710 increased by 20% =
13. 13.180 decreased by 15% =
14. 14.540 decreased by 30% =
15. 15.580 decreased by 35% =
16. 16.84 increased by 25% =
17. 17.740 increased by 15% =
18. 18.215 decreased by 20% =
19. 19.540 increased by 5% =
20. 20.435 decreased by 60% =
21. 21.520 decreased by 5% =
22. 22.80 increased by 20% =
23. 23.500 increased by 35% =
24. 24.120 decreased by 20% =
25. 25.420 increased by 15% =
26. 26.50 decreased by 12% =
27. 27.225 decreased by 40% =
28. 28.390 increased by 10% =
29. 29.400 decreased by 8% =
30. 30.180 decreased by 15% =
31. 31.120 decreased by 30% =
32. 32.760 decreased by 15% =
33. 33.440 decreased by 15% =
34. 34.125 decreased by 12% =
35. 35.610 increased by 20% =
36. 36.328 increased by 25% =
37. 37.350 decreased by 12% =
38. 38.120 increased by 35% =
39. 39.680 increased by 15% =
40. 40.335 increased by 40% =

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