Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 528 · 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. 1.560 increased by 5% =
2. 2.665 increased by 20% =
3. 3.516 increased by 75% =
4. 4.625 increased by 12% =
5. 5.765 decreased by 60% =
6. 6.260 decreased by 40% =
7. 7.80 increased by 10% =
8. 8.756 decreased by 75% =
9. 9.230 increased by 10% =
10. 10.530 decreased by 10% =
11. 11.580 increased by 10% =
12. 12.680 increased by 5% =
13. 13.175 decreased by 12% =
14. 14.390 decreased by 30% =
15. 15.280 decreased by 30% =
16. 16.250 decreased by 10% =
17. 17.800 increased by 30% =
18. 18.260 decreased by 5% =
19. 19.680 increased by 10% =
20. 20.48 decreased by 50% =
21. 21.800 decreased by 35% =
22. 22.238 increased by 50% =
23. 23.250 decreased by 12% =
24. 24.350 increased by 12% =
25. 25.555 decreased by 20% =
26. 26.524 decreased by 75% =
27. 27.320 decreased by 30% =
28. 28.220 decreased by 5% =
29. 29.480 increased by 5% =
30. 30.760 decreased by 20% =
31. 31.564 increased by 25% =
32. 32.485 decreased by 20% =
33. 33.280 decreased by 35% =
34. 34.128 increased by 75% =
35. 35.340 increased by 5% =
36. 36.75 decreased by 8% =
37. 37.408 decreased by 75% =
38. 38.660 increased by 5% =
39. 39.160 increased by 10% =
40. 40.400 decreased by 12% =

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