Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 81 · 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. 1.340 increased by 5% =
2. 2.222 increased by 50% =
3. 3.145 decreased by 60% =
4. 4.788 decreased by 25% =
5. 5.54 increased by 50% =
6. 6.450 increased by 12% =
7. 7.120 decreased by 5% =
8. 8.460 decreased by 35% =
9. 9.560 increased by 75% =
10. 10.260 decreased by 5% =
11. 11.255 increased by 20% =
12. 12.680 increased by 30% =
13. 13.200 decreased by 75% =
14. 14.525 decreased by 60% =
15. 15.680 decreased by 10% =
16. 16.300 decreased by 15% =
17. 17.400 increased by 15% =
18. 18.168 decreased by 25% =
19. 19.540 increased by 25% =
20. 20.490 increased by 40% =
21. 21.450 decreased by 12% =
22. 22.200 increased by 12% =
23. 23.294 decreased by 50% =
24. 24.175 increased by 8% =
25. 25.700 increased by 5% =
26. 26.185 increased by 60% =
27. 27.650 decreased by 8% =
28. 28.240 increased by 30% =
29. 29.140 increased by 30% =
30. 30.720 increased by 35% =
31. 31.560 decreased by 5% =
32. 32.500 decreased by 12% =
33. 33.130 decreased by 40% =
34. 34.390 increased by 30% =
35. 35.600 increased by 40% =
36. 36.525 decreased by 20% =
37. 37.240 increased by 15% =
38. 38.720 decreased by 40% =
39. 39.480 increased by 15% =
40. 40.500 decreased by 10% =

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