Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 976 · 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. 1.260 increased by 15% =
2. 2.340 increased by 35% =
3. 3.700 decreased by 12% =
4. 4.235 decreased by 40% =
5. 5.320 increased by 35% =
6. 6.560 increased by 35% =
7. 7.730 increased by 30% =
8. 8.248 increased by 25% =
9. 9.580 increased by 5% =
10. 10.500 decreased by 5% =
11. 11.600 increased by 5% =
12. 12.200 decreased by 8% =
13. 13.654 decreased by 50% =
14. 14.625 decreased by 12% =
15. 15.510 increased by 40% =
16. 16.340 increased by 5% =
17. 17.660 increased by 15% =
18. 18.260 increased by 15% =
19. 19.190 increased by 60% =
20. 20.480 increased by 30% =
21. 21.285 increased by 20% =
22. 22.796 decreased by 75% =
23. 23.230 increased by 30% =
24. 24.430 decreased by 20% =
25. 25.785 decreased by 20% =
26. 26.132 decreased by 75% =
27. 27.340 decreased by 15% =
28. 28.208 decreased by 50% =
29. 29.760 decreased by 15% =
30. 30.420 decreased by 10% =
31. 31.340 decreased by 10% =
32. 32.625 decreased by 8% =
33. 33.280 increased by 15% =
34. 34.185 decreased by 20% =
35. 35.130 increased by 10% =
36. 36.420 increased by 15% =
37. 37.715 increased by 20% =
38. 38.680 increased by 15% =
39. 39.600 decreased by 35% =
40. 40.370 increased by 30% =

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