Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 219 · 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. 1.60 decreased by 15% =
2. 2.170 increased by 40% =
3. 3.740 decreased by 30% =
4. 4.90 decreased by 30% =
5. 5.540 decreased by 35% =
6. 6.508 decreased by 25% =
7. 7.232 decreased by 25% =
8. 8.775 decreased by 8% =
9. 9.280 increased by 5% =
10. 10.75 decreased by 20% =
11. 11.460 increased by 20% =
12. 12.540 decreased by 15% =
13. 13.580 decreased by 15% =
14. 14.220 decreased by 5% =
15. 15.280 increased by 75% =
16. 16.40 decreased by 40% =
17. 17.160 decreased by 35% =
18. 18.735 increased by 20% =
19. 19.770 increased by 10% =
20. 20.240 increased by 35% =
21. 21.495 increased by 20% =
22. 22.600 increased by 12% =
23. 23.200 increased by 40% =
24. 24.580 increased by 30% =
25. 25.228 increased by 75% =
26. 26.660 decreased by 15% =
27. 27.675 increased by 8% =
28. 28.725 decreased by 8% =
29. 29.705 decreased by 60% =
30. 30.456 increased by 75% =
31. 31.800 decreased by 35% =
32. 32.390 decreased by 10% =
33. 33.566 increased by 50% =
34. 34.720 increased by 50% =
35. 35.315 decreased by 60% =
36. 36.670 increased by 10% =
37. 37.760 increased by 30% =
38. 38.240 increased by 35% =
39. 39.650 decreased by 8% =
40. 40.140 decreased by 60% =

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