Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 388 · 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. 1.360 increased by 5% =
2. 2.508 increased by 75% =
3. 3.700 increased by 8% =
4. 4.420 increased by 30% =
5. 5.700 increased by 10% =
6. 6.250 decreased by 20% =
7. 7.130 decreased by 10% =
8. 8.130 decreased by 40% =
9. 9.305 increased by 40% =
10. 10.185 increased by 60% =
11. 11.100 increased by 10% =
12. 12.750 decreased by 8% =
13. 13.304 decreased by 50% =
14. 14.208 increased by 50% =
15. 15.260 decreased by 35% =
16. 16.530 decreased by 10% =
17. 17.740 decreased by 15% =
18. 18.800 increased by 12% =
19. 19.104 increased by 25% =
20. 20.180 decreased by 10% =
21. 21.715 increased by 40% =
22. 22.460 decreased by 35% =
23. 23.590 increased by 30% =
24. 24.780 increased by 30% =
25. 25.475 increased by 8% =
26. 26.724 increased by 50% =
27. 27.160 increased by 15% =
28. 28.525 decreased by 12% =
29. 29.75 decreased by 8% =
30. 30.120 decreased by 35% =
31. 31.285 decreased by 40% =
32. 32.170 increased by 60% =
33. 33.468 decreased by 50% =
34. 34.426 increased by 50% =
35. 35.360 decreased by 5% =
36. 36.300 decreased by 25% =
37. 37.665 increased by 20% =
38. 38.70 increased by 10% =
39. 39.470 increased by 20% =
40. 40.440 increased by 15% =

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