Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 952 · 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. 1.52 increased by 25% =
2. 2.160 increased by 40% =
3. 3.325 decreased by 60% =
4. 4.530 decreased by 10% =
5. 5.710 increased by 10% =
6. 6.335 increased by 40% =
7. 7.760 increased by 35% =
8. 8.170 decreased by 10% =
9. 9.140 increased by 5% =
10. 10.660 increased by 10% =
11. 11.125 increased by 8% =
12. 12.200 increased by 40% =
13. 13.652 decreased by 75% =
14. 14.692 increased by 25% =
15. 15.628 decreased by 50% =
16. 16.440 increased by 15% =
17. 17.105 decreased by 20% =
18. 18.395 decreased by 60% =
19. 19.50 increased by 10% =
20. 20.196 increased by 25% =
21. 21.125 increased by 8% =
22. 22.500 increased by 8% =
23. 23.480 decreased by 35% =
24. 24.136 decreased by 25% =
25. 25.240 decreased by 15% =
26. 26.545 increased by 20% =
27. 27.475 increased by 40% =
28. 28.780 decreased by 10% =
29. 29.700 increased by 8% =
30. 30.60 increased by 5% =
31. 31.170 increased by 60% =
32. 32.95 increased by 60% =
33. 33.775 decreased by 40% =
34. 34.375 increased by 40% =
35. 35.244 decreased by 25% =
36. 36.420 increased by 35% =
37. 37.535 decreased by 20% =
38. 38.615 decreased by 40% =
39. 39.380 increased by 35% =
40. 40.200 decreased by 35% =

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