Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 546 · 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. 1.440 increased by 10% =
2. 2.696 increased by 75% =
3. 3.120 increased by 10% =
4. 4.430 decreased by 10% =
5. 5.720 increased by 10% =
6. 6.225 decreased by 12% =
7. 7.80 decreased by 30% =
8. 8.500 increased by 5% =
9. 9.320 decreased by 25% =
10. 10.75 increased by 8% =
11. 11.50 increased by 12% =
12. 12.415 decreased by 60% =
13. 13.144 increased by 75% =
14. 14.500 increased by 12% =
15. 15.584 decreased by 75% =
16. 16.690 increased by 30% =
17. 17.160 decreased by 40% =
18. 18.340 increased by 60% =
19. 19.226 increased by 50% =
20. 20.770 increased by 20% =
21. 21.132 decreased by 50% =
22. 22.120 increased by 35% =
23. 23.255 increased by 20% =
24. 24.104 increased by 50% =
25. 25.650 decreased by 20% =
26. 26.150 decreased by 30% =
27. 27.650 increased by 40% =
28. 28.540 decreased by 15% =
29. 29.304 decreased by 75% =
30. 30.260 increased by 25% =
31. 31.650 increased by 12% =
32. 32.255 increased by 20% =
33. 33.510 increased by 10% =
34. 34.360 decreased by 10% =
35. 35.545 increased by 20% =
36. 36.500 increased by 15% =
37. 37.332 increased by 50% =
38. 38.355 decreased by 60% =
39. 39.90 increased by 20% =
40. 40.635 increased by 60% =

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