Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 795 · 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. 1.645 increased by 40% =
2. 2.695 decreased by 60% =
3. 3.660 increased by 20% =
4. 4.130 decreased by 30% =
5. 5.136 decreased by 25% =
6. 6.425 increased by 20% =
7. 7.380 increased by 5% =
8. 8.85 increased by 60% =
9. 9.100 increased by 8% =
10. 10.175 decreased by 12% =
11. 11.220 decreased by 5% =
12. 12.312 decreased by 75% =
13. 13.75 increased by 12% =
14. 14.524 decreased by 75% =
15. 15.528 decreased by 50% =
16. 16.250 increased by 12% =
17. 17.740 decreased by 10% =
18. 18.610 increased by 60% =
19. 19.796 decreased by 75% =
20. 20.355 decreased by 60% =
21. 21.205 increased by 60% =
22. 22.504 decreased by 25% =
23. 23.640 decreased by 75% =
24. 24.92 increased by 25% =
25. 25.200 increased by 40% =
26. 26.330 increased by 20% =
27. 27.100 decreased by 40% =
28. 28.420 increased by 25% =
29. 29.495 increased by 40% =
30. 30.625 increased by 12% =
31. 31.525 decreased by 12% =
32. 32.740 decreased by 15% =
33. 33.280 increased by 10% =
34. 34.540 decreased by 15% =
35. 35.800 decreased by 15% =
36. 36.205 decreased by 20% =
37. 37.626 increased by 50% =
38. 38.320 decreased by 40% =
39. 39.530 increased by 20% =
40. 40.710 increased by 20% =

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