Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 78 · 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. 1.60 increased by 10% =
2. 2.375 increased by 8% =
3. 3.220 increased by 10% =
4. 4.184 increased by 75% =
5. 5.780 decreased by 10% =
6. 6.660 decreased by 35% =
7. 7.540 increased by 20% =
8. 8.620 decreased by 5% =
9. 9.164 increased by 25% =
10. 10.192 increased by 25% =
11. 11.80 decreased by 5% =
12. 12.600 increased by 10% =
13. 13.504 increased by 25% =
14. 14.620 increased by 5% =
15. 15.40 decreased by 5% =
16. 16.472 increased by 75% =
17. 17.432 decreased by 50% =
18. 18.400 decreased by 5% =
19. 19.225 decreased by 8% =
20. 20.600 increased by 8% =
21. 21.88 increased by 75% =
22. 22.340 increased by 40% =
23. 23.800 increased by 20% =
24. 24.220 increased by 5% =
25. 25.150 decreased by 8% =
26. 26.320 increased by 5% =
27. 27.412 decreased by 25% =
28. 28.200 increased by 15% =
29. 29.80 increased by 30% =
30. 30.620 decreased by 15% =
31. 31.358 decreased by 50% =
32. 32.775 increased by 40% =
33. 33.90 decreased by 10% =
34. 34.292 decreased by 50% =
35. 35.400 increased by 12% =
36. 36.286 increased by 50% =
37. 37.116 increased by 50% =
38. 38.725 decreased by 60% =
39. 39.258 decreased by 50% =
40. 40.88 decreased by 25% =

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