Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 265 · 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. 1.640 decreased by 75% =
2. 2.250 increased by 8% =
3. 3.435 increased by 60% =
4. 4.175 decreased by 60% =
5. 5.224 decreased by 50% =
6. 6.690 increased by 50% =
7. 7.250 increased by 10% =
8. 8.190 decreased by 10% =
9. 9.720 increased by 20% =
10. 10.620 increased by 10% =
11. 11.430 increased by 60% =
12. 12.60 decreased by 15% =
13. 13.74 decreased by 50% =
14. 14.380 increased by 15% =
15. 15.434 decreased by 50% =
16. 16.380 increased by 35% =
17. 17.460 increased by 10% =
18. 18.500 increased by 35% =
19. 19.680 increased by 75% =
20. 20.470 increased by 20% =
21. 21.650 increased by 30% =
22. 22.160 decreased by 15% =
23. 23.715 increased by 20% =
24. 24.220 increased by 5% =
25. 25.128 increased by 75% =
26. 26.45 decreased by 60% =
27. 27.40 increased by 35% =
28. 28.50 decreased by 12% =
29. 29.300 decreased by 12% =
30. 30.308 increased by 75% =
31. 31.396 increased by 50% =
32. 32.98 increased by 50% =
33. 33.400 decreased by 8% =
34. 34.505 increased by 20% =
35. 35.100 decreased by 60% =
36. 36.290 increased by 60% =
37. 37.490 increased by 60% =
38. 38.226 decreased by 50% =
39. 39.200 decreased by 8% =
40. 40.600 increased by 60% =

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