Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 865 · 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. 1.40 increased by 5% =
2. 2.464 decreased by 25% =
3. 3.780 increased by 5% =
4. 4.160 decreased by 5% =
5. 5.100 decreased by 8% =
6. 6.660 decreased by 5% =
7. 7.375 decreased by 20% =
8. 8.700 increased by 10% =
9. 9.760 increased by 40% =
10. 10.625 increased by 12% =
11. 11.75 increased by 20% =
12. 12.800 decreased by 15% =
13. 13.450 increased by 20% =
14. 14.760 decreased by 35% =
15. 15.496 increased by 75% =
16. 16.636 decreased by 50% =
17. 17.260 increased by 35% =
18. 18.680 increased by 15% =
19. 19.266 decreased by 50% =
20. 20.500 increased by 60% =
21. 21.192 increased by 75% =
22. 22.390 increased by 20% =
23. 23.530 increased by 10% =
24. 24.796 increased by 75% =
25. 25.360 decreased by 10% =
26. 26.490 decreased by 10% =
27. 27.224 decreased by 50% =
28. 28.190 increased by 10% =
29. 29.484 increased by 25% =
30. 30.640 increased by 10% =
31. 31.90 decreased by 10% =
32. 32.420 decreased by 5% =
33. 33.630 increased by 40% =
34. 34.190 increased by 30% =
35. 35.135 decreased by 40% =
36. 36.672 decreased by 25% =
37. 37.640 increased by 30% =
38. 38.530 increased by 40% =
39. 39.60 increased by 15% =
40. 40.144 decreased by 25% =

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