Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 689 · 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. 1.240 increased by 35% =
2. 2.540 increased by 25% =
3. 3.400 decreased by 12% =
4. 4.700 increased by 35% =
5. 5.160 decreased by 60% =
6. 6.530 increased by 20% =
7. 7.725 increased by 8% =
8. 8.700 increased by 10% =
9. 9.250 decreased by 12% =
10. 10.560 increased by 35% =
11. 11.175 increased by 60% =
12. 12.470 increased by 40% =
13. 13.125 decreased by 12% =
14. 14.80 increased by 20% =
15. 15.600 decreased by 5% =
16. 16.50 decreased by 12% =
17. 17.520 increased by 5% =
18. 18.100 decreased by 75% =
19. 19.220 decreased by 35% =
20. 20.260 decreased by 20% =
21. 21.198 increased by 50% =
22. 22.670 decreased by 60% =
23. 23.760 decreased by 60% =
24. 24.230 decreased by 30% =
25. 25.368 increased by 50% =
26. 26.660 decreased by 35% =
27. 27.600 increased by 8% =
28. 28.252 increased by 75% =
29. 29.752 increased by 25% =
30. 30.740 decreased by 30% =
31. 31.525 increased by 8% =
32. 32.540 increased by 10% =
33. 33.675 decreased by 12% =
34. 34.190 increased by 40% =
35. 35.332 increased by 25% =
36. 36.240 increased by 35% =
37. 37.290 increased by 30% =
38. 38.500 increased by 25% =
39. 39.594 decreased by 50% =
40. 40.175 decreased by 8% =

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