Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 463 · 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. 1.240 increased by 40% =
2. 2.460 increased by 10% =
3. 3.536 increased by 75% =
4. 4.220 decreased by 15% =
5. 5.68 decreased by 75% =
6. 6.44 increased by 50% =
7. 7.370 increased by 40% =
8. 8.562 increased by 50% =
9. 9.620 increased by 30% =
10. 10.800 decreased by 20% =
11. 11.700 increased by 15% =
12. 12.380 increased by 40% =
13. 13.520 increased by 5% =
14. 14.592 decreased by 25% =
15. 15.140 increased by 30% =
16. 16.400 increased by 12% =
17. 17.460 decreased by 10% =
18. 18.620 increased by 30% =
19. 19.560 decreased by 5% =
20. 20.575 decreased by 60% =
21. 21.600 decreased by 35% =
22. 22.144 decreased by 50% =
23. 23.115 decreased by 60% =
24. 24.420 decreased by 15% =
25. 25.696 increased by 75% =
26. 26.405 increased by 40% =
27. 27.456 decreased by 25% =
28. 28.560 decreased by 10% =
29. 29.740 decreased by 15% =
30. 30.516 decreased by 50% =
31. 31.580 increased by 10% =
32. 32.592 decreased by 25% =
33. 33.552 increased by 25% =
34. 34.40 increased by 15% =
35. 35.686 increased by 50% =
36. 36.355 increased by 20% =
37. 37.626 increased by 50% =
38. 38.650 increased by 60% =
39. 39.635 increased by 20% =
40. 40.520 increased by 25% =

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