Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 440 · 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. 1.500 decreased by 15% =
2. 2.670 increased by 10% =
3. 3.204 decreased by 75% =
4. 4.360 decreased by 10% =
5. 5.180 increased by 10% =
6. 6.100 decreased by 35% =
7. 7.524 decreased by 75% =
8. 8.300 increased by 35% =
9. 9.716 decreased by 25% =
10. 10.400 increased by 60% =
11. 11.360 decreased by 10% =
12. 12.44 decreased by 25% =
13. 13.50 decreased by 60% =
14. 14.195 increased by 60% =
15. 15.490 decreased by 10% =
16. 16.600 increased by 10% =
17. 17.175 increased by 40% =
18. 18.250 increased by 60% =
19. 19.130 increased by 10% =
20. 20.780 increased by 5% =
21. 21.750 decreased by 12% =
22. 22.280 increased by 20% =
23. 23.200 decreased by 12% =
24. 24.185 increased by 40% =
25. 25.762 decreased by 50% =
26. 26.516 increased by 25% =
27. 27.220 increased by 30% =
28. 28.700 increased by 15% =
29. 29.296 decreased by 75% =
30. 30.540 increased by 5% =
31. 31.220 increased by 15% =
32. 32.70 decreased by 20% =
33. 33.775 increased by 12% =
34. 34.334 decreased by 50% =
35. 35.760 decreased by 10% =
36. 36.175 increased by 12% =
37. 37.320 decreased by 15% =
38. 38.600 decreased by 12% =
39. 39.740 increased by 5% =
40. 40.540 decreased by 15% =

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