Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 8 · 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. 1.755 increased by 20% =
2. 2.320 decreased by 20% =
3. 3.660 decreased by 40% =
4. 4.200 decreased by 35% =
5. 5.45 increased by 40% =
6. 6.148 decreased by 25% =
7. 7.40 decreased by 15% =
8. 8.40 increased by 5% =
9. 9.460 increased by 30% =
10. 10.145 increased by 20% =
11. 11.360 decreased by 5% =
12. 12.80 decreased by 15% =
13. 13.660 increased by 35% =
14. 14.750 decreased by 12% =
15. 15.420 increased by 15% =
16. 16.268 increased by 75% =
17. 17.240 decreased by 5% =
18. 18.445 increased by 20% =
19. 19.440 increased by 10% =
20. 20.500 decreased by 12% =
21. 21.100 decreased by 15% =
22. 22.800 decreased by 5% =
23. 23.90 increased by 30% =
24. 24.700 increased by 35% =
25. 25.550 increased by 20% =
26. 26.380 increased by 50% =
27. 27.490 decreased by 10% =
28. 28.200 increased by 15% =
29. 29.176 increased by 75% =
30. 30.240 decreased by 40% =
31. 31.520 increased by 5% =
32. 32.365 increased by 40% =
33. 33.625 decreased by 40% =
34. 34.220 decreased by 5% =
35. 35.106 increased by 50% =
36. 36.360 decreased by 75% =
37. 37.660 decreased by 5% =
38. 38.85 decreased by 20% =
39. 39.320 increased by 35% =
40. 40.100 increased by 5% =

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