Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 558 · 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. 1.140 increased by 30% =
2. 2.800 decreased by 5% =
3. 3.795 decreased by 40% =
4. 4.84 decreased by 25% =
5. 5.255 decreased by 20% =
6. 6.450 increased by 8% =
7. 7.608 decreased by 75% =
8. 8.430 increased by 20% =
9. 9.620 decreased by 35% =
10. 10.485 increased by 40% =
11. 11.440 increased by 25% =
12. 12.752 decreased by 75% =
13. 13.545 increased by 20% =
14. 14.95 decreased by 40% =
15. 15.480 decreased by 35% =
16. 16.480 increased by 40% =
17. 17.540 decreased by 5% =
18. 18.120 decreased by 10% =
19. 19.630 decreased by 10% =
20. 20.85 decreased by 60% =
21. 21.720 increased by 35% =
22. 22.290 increased by 10% =
23. 23.595 increased by 60% =
24. 24.440 increased by 15% =
25. 25.200 decreased by 15% =
26. 26.120 decreased by 15% =
27. 27.760 decreased by 35% =
28. 28.520 increased by 10% =
29. 29.260 increased by 5% =
30. 30.630 decreased by 30% =
31. 31.230 increased by 60% =
32. 32.260 decreased by 5% =
33. 33.480 increased by 20% =
34. 34.235 decreased by 40% =
35. 35.590 decreased by 20% =
36. 36.244 decreased by 50% =
37. 37.500 decreased by 10% =
38. 38.324 decreased by 50% =
39. 39.240 decreased by 30% =
40. 40.500 decreased by 10% =

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