Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 555 · 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. 1.400 increased by 35% =
2. 2.260 decreased by 35% =
3. 3.184 increased by 25% =
4. 4.135 increased by 60% =
5. 5.680 increased by 10% =
6. 6.720 increased by 30% =
7. 7.320 increased by 35% =
8. 8.776 increased by 75% =
9. 9.680 increased by 15% =
10. 10.660 decreased by 60% =
11. 11.90 increased by 10% =
12. 12.460 decreased by 30% =
13. 13.600 increased by 30% =
14. 14.752 decreased by 25% =
15. 15.75 decreased by 8% =
16. 16.520 increased by 35% =
17. 17.660 increased by 30% =
18. 18.360 decreased by 5% =
19. 19.125 decreased by 12% =
20. 20.725 increased by 12% =
21. 21.240 increased by 15% =
22. 22.266 decreased by 50% =
23. 23.300 decreased by 15% =
24. 24.445 decreased by 40% =
25. 25.240 increased by 15% =
26. 26.450 increased by 8% =
27. 27.490 decreased by 20% =
28. 28.295 increased by 40% =
29. 29.40 decreased by 15% =
30. 30.525 increased by 8% =
31. 31.200 decreased by 30% =
32. 32.485 increased by 20% =
33. 33.450 decreased by 12% =
34. 34.110 decreased by 40% =
35. 35.730 increased by 10% =
36. 36.370 increased by 30% =
37. 37.800 increased by 8% =
38. 38.280 increased by 15% =
39. 39.60 decreased by 35% =
40. 40.755 increased by 40% =

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