Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 508 · 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. 1.272 decreased by 75% =
2. 2.345 increased by 60% =
3. 3.410 increased by 10% =
4. 4.285 decreased by 60% =
5. 5.232 increased by 25% =
6. 6.132 decreased by 25% =
7. 7.45 decreased by 60% =
8. 8.725 decreased by 40% =
9. 9.335 decreased by 20% =
10. 10.580 decreased by 5% =
11. 11.90 increased by 40% =
12. 12.130 decreased by 30% =
13. 13.75 decreased by 12% =
14. 14.60 increased by 35% =
15. 15.666 decreased by 50% =
16. 16.236 increased by 75% =
17. 17.180 decreased by 30% =
18. 18.480 increased by 5% =
19. 19.600 increased by 5% =
20. 20.670 increased by 40% =
21. 21.710 increased by 20% =
22. 22.222 increased by 50% =
23. 23.400 decreased by 8% =
24. 24.550 decreased by 8% =
25. 25.660 increased by 5% =
26. 26.340 decreased by 15% =
27. 27.275 increased by 8% =
28. 28.720 increased by 25% =
29. 29.600 decreased by 15% =
30. 30.264 increased by 25% =
31. 31.785 decreased by 20% =
32. 32.300 decreased by 8% =
33. 33.740 increased by 50% =
34. 34.220 decreased by 20% =
35. 35.300 increased by 5% =
36. 36.760 decreased by 20% =
37. 37.390 increased by 10% =
38. 38.160 increased by 75% =
39. 39.60 decreased by 15% =
40. 40.294 increased by 50% =

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