Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 702 · 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. 1.400 decreased by 60% =
2. 2.300 increased by 30% =
3. 3.80 decreased by 15% =
4. 4.780 increased by 30% =
5. 5.722 decreased by 50% =
6. 6.426 increased by 50% =
7. 7.440 decreased by 35% =
8. 8.800 increased by 5% =
9. 9.330 increased by 10% =
10. 10.720 increased by 5% =
11. 11.480 decreased by 35% =
12. 12.122 decreased by 50% =
13. 13.50 decreased by 12% =
14. 14.440 increased by 10% =
15. 15.775 decreased by 12% =
16. 16.530 increased by 10% =
17. 17.532 decreased by 25% =
18. 18.344 increased by 75% =
19. 19.204 increased by 50% =
20. 20.568 increased by 75% =
21. 21.170 increased by 20% =
22. 22.82 increased by 50% =
23. 23.140 increased by 35% =
24. 24.300 decreased by 12% =
25. 25.134 decreased by 50% =
26. 26.700 decreased by 15% =
27. 27.772 decreased by 50% =
28. 28.690 increased by 20% =
29. 29.675 decreased by 40% =
30. 30.220 decreased by 35% =
31. 31.540 increased by 5% =
32. 32.700 increased by 5% =
33. 33.444 decreased by 50% =
34. 34.536 decreased by 25% =
35. 35.200 decreased by 35% =
36. 36.440 decreased by 60% =
37. 37.320 increased by 10% =
38. 38.285 increased by 20% =
39. 39.720 increased by 10% =
40. 40.760 decreased by 15% =

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