Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 306 · 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. 1.300 increased by 40% =
2. 2.240 increased by 15% =
3. 3.325 increased by 8% =
4. 4.640 decreased by 15% =
5. 5.240 decreased by 10% =
6. 6.260 increased by 60% =
7. 7.68 increased by 75% =
8. 8.570 increased by 10% =
9. 9.490 increased by 10% =
10. 10.240 increased by 10% =
11. 11.265 decreased by 60% =
12. 12.760 increased by 15% =
13. 13.700 decreased by 30% =
14. 14.220 increased by 25% =
15. 15.188 decreased by 25% =
16. 16.390 decreased by 60% =
17. 17.576 increased by 50% =
18. 18.530 increased by 30% =
19. 19.50 increased by 12% =
20. 20.350 increased by 12% =
21. 21.730 decreased by 40% =
22. 22.236 increased by 25% =
23. 23.110 increased by 40% =
24. 24.605 increased by 60% =
25. 25.580 decreased by 60% =
26. 26.560 decreased by 30% =
27. 27.150 increased by 60% =
28. 28.225 increased by 8% =
29. 29.720 decreased by 20% =
30. 30.495 decreased by 40% =
31. 31.248 increased by 75% =
32. 32.465 decreased by 60% =
33. 33.415 decreased by 60% =
34. 34.636 increased by 50% =
35. 35.730 decreased by 30% =
36. 36.520 increased by 75% =
37. 37.408 increased by 25% =
38. 38.150 decreased by 8% =
39. 39.75 decreased by 12% =
40. 40.56 increased by 25% =

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