Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 246 · 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. 1.184 increased by 75% =
2. 2.190 decreased by 40% =
3. 3.400 decreased by 12% =
4. 4.205 decreased by 40% =
5. 5.335 increased by 20% =
6. 6.720 increased by 35% =
7. 7.80 increased by 75% =
8. 8.160 increased by 30% =
9. 9.100 decreased by 75% =
10. 10.490 decreased by 30% =
11. 11.520 decreased by 5% =
12. 12.410 decreased by 20% =
13. 13.528 decreased by 50% =
14. 14.60 decreased by 25% =
15. 15.430 increased by 30% =
16. 16.480 decreased by 5% =
17. 17.650 decreased by 8% =
18. 18.356 increased by 25% =
19. 19.240 increased by 75% =
20. 20.242 decreased by 50% =
21. 21.160 decreased by 30% =
22. 22.325 decreased by 12% =
23. 23.602 decreased by 50% =
24. 24.325 increased by 12% =
25. 25.250 decreased by 8% =
26. 26.40 decreased by 5% =
27. 27.450 increased by 8% =
28. 28.460 decreased by 75% =
29. 29.120 increased by 35% =
30. 30.780 decreased by 10% =
31. 31.680 decreased by 35% =
32. 32.400 decreased by 12% =
33. 33.550 decreased by 12% =
34. 34.635 increased by 40% =
35. 35.295 increased by 60% =
36. 36.140 decreased by 5% =
37. 37.60 increased by 35% =
38. 38.75 decreased by 12% =
39. 39.180 increased by 15% =
40. 40.475 decreased by 12% =

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