Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 158 · 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. 1.690 increased by 50% =
2. 2.610 increased by 20% =
3. 3.130 decreased by 30% =
4. 4.704 increased by 75% =
5. 5.615 increased by 20% =
6. 6.550 increased by 8% =
7. 7.225 decreased by 12% =
8. 8.600 increased by 20% =
9. 9.660 increased by 20% =
10. 10.705 increased by 20% =
11. 11.740 decreased by 60% =
12. 12.770 decreased by 60% =
13. 13.75 decreased by 12% =
14. 14.600 increased by 12% =
15. 15.160 decreased by 15% =
16. 16.580 decreased by 40% =
17. 17.670 increased by 20% =
18. 18.675 decreased by 8% =
19. 19.700 increased by 5% =
20. 20.660 decreased by 50% =
21. 21.665 decreased by 20% =
22. 22.755 increased by 20% =
23. 23.300 decreased by 8% =
24. 24.440 decreased by 10% =
25. 25.200 increased by 5% =
26. 26.440 increased by 25% =
27. 27.516 decreased by 25% =
28. 28.540 increased by 50% =
29. 29.695 decreased by 40% =
30. 30.240 increased by 35% =
31. 31.476 increased by 25% =
32. 32.370 increased by 10% =
33. 33.680 increased by 35% =
34. 34.780 decreased by 35% =
35. 35.188 decreased by 25% =
36. 36.600 increased by 40% =
37. 37.72 increased by 75% =
38. 38.600 increased by 12% =
39. 39.400 increased by 10% =
40. 40.700 increased by 60% =

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