Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 227 · 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. 1.520 increased by 15% =
2. 2.480 increased by 35% =
3. 3.285 decreased by 40% =
4. 4.320 decreased by 40% =
5. 5.678 increased by 50% =
6. 6.550 increased by 60% =
7. 7.764 increased by 25% =
8. 8.500 decreased by 15% =
9. 9.180 increased by 5% =
10. 10.730 decreased by 10% =
11. 11.100 decreased by 30% =
12. 12.100 decreased by 10% =
13. 13.260 increased by 5% =
14. 14.125 decreased by 12% =
15. 15.436 decreased by 25% =
16. 16.656 increased by 75% =
17. 17.620 increased by 35% =
18. 18.515 decreased by 60% =
19. 19.768 increased by 75% =
20. 20.300 increased by 8% =
21. 21.375 increased by 12% =
22. 22.420 increased by 30% =
23. 23.340 decreased by 5% =
24. 24.720 increased by 15% =
25. 25.430 increased by 10% =
26. 26.210 decreased by 30% =
27. 27.725 decreased by 8% =
28. 28.586 increased by 50% =
29. 29.580 increased by 35% =
30. 30.68 increased by 75% =
31. 31.548 decreased by 75% =
32. 32.780 increased by 35% =
33. 33.205 increased by 20% =
34. 34.450 decreased by 12% =
35. 35.525 decreased by 8% =
36. 36.400 decreased by 12% =
37. 37.690 increased by 60% =
38. 38.700 decreased by 8% =
39. 39.170 decreased by 20% =
40. 40.580 decreased by 5% =

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