Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 817 · 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. 1.130 decreased by 10% =
2. 2.60 decreased by 5% =
3. 3.260 increased by 75% =
4. 4.530 increased by 10% =
5. 5.440 increased by 40% =
6. 6.194 increased by 50% =
7. 7.325 increased by 8% =
8. 8.430 increased by 40% =
9. 9.776 increased by 25% =
10. 10.400 decreased by 60% =
11. 11.480 decreased by 35% =
12. 12.584 increased by 75% =
13. 13.160 increased by 10% =
14. 14.748 increased by 25% =
15. 15.390 decreased by 20% =
16. 16.485 decreased by 40% =
17. 17.184 increased by 75% =
18. 18.80 increased by 35% =
19. 19.500 decreased by 15% =
20. 20.110 increased by 10% =
21. 21.175 increased by 60% =
22. 22.430 increased by 20% =
23. 23.80 increased by 35% =
24. 24.235 increased by 20% =
25. 25.180 decreased by 20% =
26. 26.45 increased by 60% =
27. 27.340 decreased by 35% =
28. 28.275 increased by 12% =
29. 29.150 decreased by 8% =
30. 30.160 increased by 75% =
31. 31.764 increased by 75% =
32. 32.125 decreased by 12% =
33. 33.240 decreased by 15% =
34. 34.330 decreased by 60% =
35. 35.735 decreased by 40% =
36. 36.150 decreased by 12% =
37. 37.40 decreased by 30% =
38. 38.450 decreased by 8% =
39. 39.240 increased by 10% =
40. 40.720 increased by 35% =

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