Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 732 · 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. 1.720 increased by 15% =
2. 2.600 decreased by 8% =
3. 3.175 decreased by 8% =
4. 4.80 increased by 30% =
5. 5.570 increased by 60% =
6. 6.728 decreased by 25% =
7. 7.700 decreased by 15% =
8. 8.330 increased by 20% =
9. 9.456 decreased by 75% =
10. 10.675 decreased by 8% =
11. 11.800 increased by 5% =
12. 12.540 decreased by 5% =
13. 13.460 increased by 10% =
14. 14.220 increased by 10% =
15. 15.710 increased by 60% =
16. 16.725 increased by 12% =
17. 17.800 increased by 12% =
18. 18.452 decreased by 75% =
19. 19.185 increased by 20% =
20. 20.375 decreased by 40% =
21. 21.120 increased by 15% =
22. 22.660 decreased by 40% =
23. 23.88 increased by 25% =
24. 24.510 increased by 20% =
25. 25.55 increased by 60% =
26. 26.220 increased by 5% =
27. 27.420 increased by 75% =
28. 28.44 increased by 25% =
29. 29.200 increased by 12% =
30. 30.170 increased by 10% =
31. 31.675 increased by 12% =
32. 32.250 decreased by 30% =
33. 33.475 increased by 12% =
34. 34.395 increased by 60% =
35. 35.470 decreased by 30% =
36. 36.650 increased by 40% =
37. 37.610 increased by 20% =
38. 38.635 increased by 60% =
39. 39.245 increased by 20% =
40. 40.50 increased by 60% =

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