Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 773 · 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. 1.554 increased by 50% =
2. 2.640 decreased by 5% =
3. 3.404 increased by 25% =
4. 4.195 increased by 60% =
5. 5.670 increased by 60% =
6. 6.580 decreased by 25% =
7. 7.764 increased by 25% =
8. 8.730 increased by 10% =
9. 9.340 increased by 20% =
10. 10.460 decreased by 35% =
11. 11.350 increased by 8% =
12. 12.320 decreased by 35% =
13. 13.620 decreased by 10% =
14. 14.700 decreased by 12% =
15. 15.160 increased by 10% =
16. 16.500 increased by 12% =
17. 17.495 increased by 40% =
18. 18.308 increased by 50% =
19. 19.800 decreased by 15% =
20. 20.680 decreased by 10% =
21. 21.540 increased by 35% =
22. 22.420 increased by 15% =
23. 23.560 decreased by 75% =
24. 24.610 increased by 30% =
25. 25.360 decreased by 35% =
26. 26.230 increased by 10% =
27. 27.170 increased by 10% =
28. 28.615 decreased by 60% =
29. 29.400 increased by 8% =
30. 30.256 decreased by 25% =
31. 31.92 increased by 75% =
32. 32.284 increased by 75% =
33. 33.176 increased by 25% =
34. 34.620 decreased by 35% =
35. 35.580 increased by 35% =
36. 36.610 decreased by 10% =
37. 37.60 decreased by 10% =
38. 38.480 increased by 10% =
39. 39.75 decreased by 12% =
40. 40.485 increased by 60% =

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