Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 520 · 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. 1.240 increased by 5% =
2. 2.800 increased by 8% =
3. 3.760 increased by 60% =
4. 4.500 increased by 12% =
5. 5.68 decreased by 50% =
6. 6.800 increased by 10% =
7. 7.740 increased by 5% =
8. 8.420 decreased by 40% =
9. 9.660 increased by 15% =
10. 10.310 increased by 20% =
11. 11.740 increased by 60% =
12. 12.120 increased by 5% =
13. 13.795 increased by 40% =
14. 14.80 increased by 40% =
15. 15.100 increased by 12% =
16. 16.480 increased by 60% =
17. 17.60 decreased by 5% =
18. 18.655 decreased by 20% =
19. 19.470 increased by 60% =
20. 20.700 increased by 5% =
21. 21.530 increased by 20% =
22. 22.130 increased by 20% =
23. 23.680 decreased by 5% =
24. 24.300 increased by 8% =
25. 25.560 decreased by 5% =
26. 26.800 increased by 35% =
27. 27.575 decreased by 12% =
28. 28.205 increased by 40% =
29. 29.190 increased by 30% =
30. 30.760 increased by 40% =
31. 31.740 decreased by 75% =
32. 32.448 increased by 25% =
33. 33.48 decreased by 25% =
34. 34.690 increased by 60% =
35. 35.690 decreased by 20% =
36. 36.180 increased by 15% =
37. 37.100 decreased by 15% =
38. 38.455 increased by 40% =
39. 39.75 decreased by 8% =
40. 40.260 increased by 15% =

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