Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 403 · 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. 1.180 increased by 35% =
2. 2.252 decreased by 50% =
3. 3.325 increased by 12% =
4. 4.460 increased by 35% =
5. 5.176 decreased by 75% =
6. 6.290 decreased by 20% =
7. 7.745 decreased by 60% =
8. 8.420 decreased by 35% =
9. 9.225 increased by 20% =
10. 10.44 increased by 75% =
11. 11.445 increased by 20% =
12. 12.160 decreased by 10% =
13. 13.180 increased by 35% =
14. 14.340 decreased by 25% =
15. 15.620 decreased by 35% =
16. 16.380 increased by 15% =
17. 17.356 increased by 25% =
18. 18.172 decreased by 25% =
19. 19.360 increased by 15% =
20. 20.780 increased by 35% =
21. 21.325 increased by 12% =
22. 22.750 decreased by 12% =
23. 23.652 decreased by 25% =
24. 24.316 increased by 50% =
25. 25.200 decreased by 10% =
26. 26.125 decreased by 40% =
27. 27.300 decreased by 30% =
28. 28.240 increased by 35% =
29. 29.585 increased by 20% =
30. 30.64 increased by 75% =
31. 31.375 decreased by 12% =
32. 32.625 decreased by 8% =
33. 33.140 decreased by 5% =
34. 34.570 increased by 10% =
35. 35.175 increased by 12% =
36. 36.620 decreased by 30% =
37. 37.170 increased by 30% =
38. 38.600 decreased by 12% =
39. 39.400 decreased by 30% =
40. 40.485 increased by 20% =

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