Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 701 · 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. 1.680 increased by 5% =
2. 2.352 decreased by 75% =
3. 3.800 decreased by 5% =
4. 4.440 decreased by 15% =
5. 5.50 increased by 10% =
6. 6.720 increased by 60% =
7. 7.730 decreased by 30% =
8. 8.630 decreased by 30% =
9. 9.575 increased by 8% =
10. 10.54 increased by 50% =
11. 11.800 increased by 15% =
12. 12.160 increased by 60% =
13. 13.300 decreased by 15% =
14. 14.105 increased by 20% =
15. 15.450 decreased by 30% =
16. 16.520 decreased by 40% =
17. 17.672 increased by 50% =
18. 18.88 increased by 75% =
19. 19.500 increased by 15% =
20. 20.50 decreased by 12% =
21. 21.745 decreased by 20% =
22. 22.655 decreased by 40% =
23. 23.320 increased by 35% =
24. 24.410 increased by 30% =
25. 25.280 increased by 20% =
26. 26.200 increased by 15% =
27. 27.580 increased by 35% =
28. 28.575 decreased by 20% =
29. 29.796 increased by 75% =
30. 30.450 increased by 60% =
31. 31.680 decreased by 25% =
32. 32.660 decreased by 30% =
33. 33.40 decreased by 35% =
34. 34.440 decreased by 10% =
35. 35.380 increased by 35% =
36. 36.440 increased by 15% =
37. 37.92 decreased by 25% =
38. 38.65 decreased by 60% =
39. 39.460 increased by 5% =
40. 40.60 increased by 40% =

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