Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 432 · 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. 1.410 decreased by 30% =
2. 2.300 increased by 35% =
3. 3.760 increased by 25% =
4. 4.300 increased by 5% =
5. 5.420 decreased by 10% =
6. 6.605 increased by 60% =
7. 7.60 decreased by 50% =
8. 8.740 increased by 35% =
9. 9.525 decreased by 60% =
10. 10.88 decreased by 75% =
11. 11.480 decreased by 15% =
12. 12.110 decreased by 10% =
13. 13.660 decreased by 15% =
14. 14.760 decreased by 5% =
15. 15.780 increased by 35% =
16. 16.200 increased by 30% =
17. 17.770 increased by 10% =
18. 18.250 decreased by 8% =
19. 19.500 increased by 60% =
20. 20.125 decreased by 8% =
21. 21.450 increased by 8% =
22. 22.676 decreased by 50% =
23. 23.420 increased by 35% =
24. 24.175 decreased by 8% =
25. 25.170 increased by 60% =
26. 26.236 decreased by 75% =
27. 27.660 increased by 35% =
28. 28.660 increased by 35% =
29. 29.540 decreased by 35% =
30. 30.232 decreased by 75% =
31. 31.730 decreased by 10% =
32. 32.720 decreased by 5% =
33. 33.500 decreased by 25% =
34. 34.350 decreased by 8% =
35. 35.540 increased by 40% =
36. 36.125 increased by 12% =
37. 37.584 increased by 25% =
38. 38.104 increased by 25% =
39. 39.775 increased by 12% =
40. 40.675 decreased by 60% =

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