Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 58 · 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. 1.460 increased by 15% =
2. 2.620 increased by 10% =
3. 3.200 decreased by 10% =
4. 4.680 increased by 10% =
5. 5.500 decreased by 50% =
6. 6.590 decreased by 10% =
7. 7.668 increased by 75% =
8. 8.120 decreased by 10% =
9. 9.155 increased by 20% =
10. 10.200 increased by 5% =
11. 11.660 decreased by 15% =
12. 12.225 increased by 8% =
13. 13.296 decreased by 25% =
14. 14.480 increased by 15% =
15. 15.490 decreased by 30% =
16. 16.365 decreased by 60% =
17. 17.780 increased by 15% =
18. 18.700 increased by 15% =
19. 19.525 decreased by 8% =
20. 20.632 decreased by 25% =
21. 21.235 decreased by 20% =
22. 22.340 decreased by 15% =
23. 23.425 increased by 20% =
24. 24.125 increased by 40% =
25. 25.200 decreased by 15% =
26. 26.790 increased by 60% =
27. 27.156 increased by 25% =
28. 28.480 decreased by 10% =
29. 29.560 increased by 20% =
30. 30.300 increased by 12% =
31. 31.790 increased by 40% =
32. 32.760 decreased by 35% =
33. 33.175 increased by 12% =
34. 34.588 increased by 75% =
35. 35.510 decreased by 50% =
36. 36.616 decreased by 25% =
37. 37.684 decreased by 75% =
38. 38.700 decreased by 8% =
39. 39.350 increased by 30% =
40. 40.152 decreased by 50% =

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