Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 963 · 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. 1.180 increased by 35% =
2. 2.60 increased by 35% =
3. 3.328 decreased by 75% =
4. 4.220 increased by 25% =
5. 5.400 decreased by 25% =
6. 6.100 decreased by 15% =
7. 7.120 increased by 15% =
8. 8.360 decreased by 15% =
9. 9.52 decreased by 25% =
10. 10.340 increased by 30% =
11. 11.250 increased by 20% =
12. 12.200 increased by 5% =
13. 13.600 increased by 60% =
14. 14.200 increased by 12% =
15. 15.90 increased by 60% =
16. 16.580 decreased by 5% =
17. 17.356 decreased by 75% =
18. 18.660 decreased by 5% =
19. 19.712 increased by 75% =
20. 20.660 decreased by 30% =
21. 21.375 decreased by 12% =
22. 22.125 increased by 12% =
23. 23.216 increased by 75% =
24. 24.725 increased by 12% =
25. 25.260 decreased by 75% =
26. 26.764 increased by 50% =
27. 27.220 decreased by 15% =
28. 28.50 increased by 20% =
29. 29.595 increased by 60% =
30. 30.530 decreased by 60% =
31. 31.670 decreased by 60% =
32. 32.455 increased by 20% =
33. 33.470 increased by 60% =
34. 34.140 decreased by 5% =
35. 35.740 decreased by 30% =
36. 36.70 decreased by 60% =
37. 37.680 decreased by 40% =
38. 38.288 decreased by 75% =
39. 39.552 increased by 75% =
40. 40.320 decreased by 5% =

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