Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 468 · 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 60% =
2. 2.60 increased by 5% =
3. 3.760 increased by 10% =
4. 4.410 decreased by 50% =
5. 5.636 decreased by 50% =
6. 6.200 increased by 8% =
7. 7.360 increased by 20% =
8. 8.175 decreased by 8% =
9. 9.110 decreased by 30% =
10. 10.46 decreased by 50% =
11. 11.780 decreased by 30% =
12. 12.735 increased by 60% =
13. 13.625 increased by 8% =
14. 14.270 decreased by 10% =
15. 15.555 increased by 20% =
16. 16.256 increased by 25% =
17. 17.220 decreased by 35% =
18. 18.600 increased by 10% =
19. 19.136 increased by 25% =
20. 20.475 decreased by 8% =
21. 21.275 increased by 8% =
22. 22.405 decreased by 40% =
23. 23.340 increased by 5% =
24. 24.96 increased by 25% =
25. 25.350 decreased by 10% =
26. 26.344 decreased by 25% =
27. 27.560 decreased by 10% =
28. 28.154 increased by 50% =
29. 29.168 decreased by 25% =
30. 30.730 increased by 30% =
31. 31.132 increased by 25% =
32. 32.76 decreased by 25% =
33. 33.312 decreased by 75% =
34. 34.170 increased by 30% =
35. 35.285 decreased by 40% =
36. 36.310 decreased by 10% =
37. 37.590 increased by 30% =
38. 38.492 increased by 50% =
39. 39.600 increased by 5% =
40. 40.240 increased by 15% =

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