Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 251 · 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. 1.460 increased by 10% =
2. 2.220 decreased by 15% =
3. 3.365 increased by 60% =
4. 4.510 increased by 30% =
5. 5.790 decreased by 20% =
6. 6.260 decreased by 5% =
7. 7.220 decreased by 30% =
8. 8.175 increased by 12% =
9. 9.620 decreased by 10% =
10. 10.450 decreased by 12% =
11. 11.664 increased by 25% =
12. 12.600 increased by 12% =
13. 13.96 increased by 25% =
14. 14.748 increased by 75% =
15. 15.80 increased by 5% =
16. 16.340 decreased by 15% =
17. 17.196 increased by 25% =
18. 18.500 decreased by 5% =
19. 19.735 increased by 60% =
20. 20.235 increased by 20% =
21. 21.295 decreased by 40% =
22. 22.610 increased by 60% =
23. 23.460 decreased by 60% =
24. 24.80 decreased by 60% =
25. 25.240 decreased by 5% =
26. 26.280 increased by 20% =
27. 27.425 increased by 8% =
28. 28.410 decreased by 10% =
29. 29.750 increased by 8% =
30. 30.510 increased by 30% =
31. 31.370 decreased by 10% =
32. 32.725 increased by 8% =
33. 33.40 increased by 40% =
34. 34.395 increased by 20% =
35. 35.190 increased by 30% =
36. 36.435 decreased by 60% =
37. 37.550 decreased by 12% =
38. 38.155 increased by 20% =
39. 39.660 increased by 25% =
40. 40.140 increased by 35% =

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