Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 641 · 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. 1.796 decreased by 75% =
2. 2.780 decreased by 10% =
3. 3.262 increased by 50% =
4. 4.600 increased by 8% =
5. 5.75 decreased by 8% =
6. 6.140 decreased by 35% =
7. 7.395 increased by 20% =
8. 8.48 decreased by 75% =
9. 9.464 decreased by 25% =
10. 10.528 increased by 25% =
11. 11.400 increased by 5% =
12. 12.570 decreased by 10% =
13. 13.640 increased by 5% =
14. 14.640 decreased by 40% =
15. 15.572 decreased by 25% =
16. 16.200 decreased by 50% =
17. 17.240 increased by 15% =
18. 18.340 decreased by 15% =
19. 19.630 decreased by 30% =
20. 20.525 decreased by 8% =
21. 21.160 increased by 15% =
22. 22.756 decreased by 50% =
23. 23.100 increased by 8% =
24. 24.40 increased by 60% =
25. 25.675 increased by 12% =
26. 26.750 decreased by 12% =
27. 27.168 increased by 50% =
28. 28.680 increased by 5% =
29. 29.660 increased by 30% =
30. 30.40 increased by 15% =
31. 31.785 decreased by 60% =
32. 32.475 increased by 12% =
33. 33.720 increased by 10% =
34. 34.800 increased by 35% =
35. 35.125 increased by 20% =
36. 36.225 decreased by 8% =
37. 37.536 decreased by 50% =
38. 38.200 decreased by 8% =
39. 39.400 increased by 20% =
40. 40.140 increased by 40% =

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