Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 646 · 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. 1.540 increased by 5% =
2. 2.752 decreased by 25% =
3. 3.425 decreased by 12% =
4. 4.580 decreased by 50% =
5. 5.175 increased by 60% =
6. 6.260 decreased by 5% =
7. 7.290 increased by 30% =
8. 8.290 decreased by 30% =
9. 9.65 decreased by 20% =
10. 10.200 decreased by 75% =
11. 11.500 increased by 15% =
12. 12.630 decreased by 10% =
13. 13.240 increased by 15% =
14. 14.525 decreased by 60% =
15. 15.580 decreased by 30% =
16. 16.740 decreased by 10% =
17. 17.335 increased by 60% =
18. 18.370 increased by 30% =
19. 19.160 increased by 15% =
20. 20.715 decreased by 20% =
21. 21.390 increased by 10% =
22. 22.450 increased by 12% =
23. 23.636 increased by 75% =
24. 24.292 increased by 75% =
25. 25.155 increased by 40% =
26. 26.410 increased by 10% =
27. 27.348 decreased by 50% =
28. 28.720 decreased by 25% =
29. 29.120 increased by 15% =
30. 30.790 increased by 10% =
31. 31.460 decreased by 10% =
32. 32.540 increased by 40% =
33. 33.305 increased by 60% =
34. 34.244 increased by 75% =
35. 35.138 decreased by 50% =
36. 36.225 increased by 12% =
37. 37.620 decreased by 25% =
38. 38.140 increased by 20% =
39. 39.240 increased by 5% =
40. 40.296 increased by 25% =

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