Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 197 · 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. 1.484 increased by 25% =
2. 2.440 increased by 15% =
3. 3.340 decreased by 60% =
4. 4.660 increased by 5% =
5. 5.185 increased by 20% =
6. 6.510 decreased by 60% =
7. 7.555 decreased by 60% =
8. 8.420 increased by 15% =
9. 9.320 increased by 5% =
10. 10.570 increased by 30% =
11. 11.272 decreased by 25% =
12. 12.70 decreased by 10% =
13. 13.640 decreased by 30% =
14. 14.680 increased by 35% =
15. 15.325 decreased by 12% =
16. 16.800 increased by 35% =
17. 17.375 decreased by 8% =
18. 18.150 decreased by 10% =
19. 19.60 decreased by 30% =
20. 20.692 decreased by 25% =
21. 21.225 decreased by 12% =
22. 22.690 increased by 10% =
23. 23.588 increased by 75% =
24. 24.80 increased by 5% =
25. 25.140 decreased by 30% =
26. 26.728 decreased by 25% =
27. 27.160 decreased by 15% =
28. 28.430 decreased by 60% =
29. 29.460 increased by 75% =
30. 30.190 increased by 10% =
31. 31.510 increased by 30% =
32. 32.108 decreased by 75% =
33. 33.252 increased by 75% =
34. 34.260 decreased by 5% =
35. 35.795 increased by 20% =
36. 36.775 increased by 12% =
37. 37.120 decreased by 15% =
38. 38.50 increased by 10% =
39. 39.300 increased by 60% =
40. 40.580 decreased by 10% =

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