Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 62 · 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 decreased by 15% =
2. 2.250 increased by 8% =
3. 3.400 increased by 10% =
4. 4.432 decreased by 75% =
5. 5.320 decreased by 5% =
6. 6.270 decreased by 10% =
7. 7.480 increased by 5% =
8. 8.100 decreased by 75% =
9. 9.760 increased by 5% =
10. 10.720 decreased by 35% =
11. 11.375 decreased by 8% =
12. 12.95 increased by 20% =
13. 13.548 decreased by 25% =
14. 14.344 decreased by 50% =
15. 15.545 increased by 20% =
16. 16.60 decreased by 10% =
17. 17.590 decreased by 30% =
18. 18.40 decreased by 10% =
19. 19.776 decreased by 75% =
20. 20.796 increased by 50% =
21. 21.220 decreased by 15% =
22. 22.300 decreased by 35% =
23. 23.150 increased by 12% =
24. 24.720 increased by 5% =
25. 25.65 decreased by 20% =
26. 26.525 decreased by 8% =
27. 27.220 decreased by 35% =
28. 28.220 increased by 10% =
29. 29.720 decreased by 10% =
30. 30.180 decreased by 5% =
31. 31.755 decreased by 20% =
32. 32.280 increased by 50% =
33. 33.160 decreased by 15% =
34. 34.500 decreased by 5% =
35. 35.70 increased by 40% =
36. 36.684 increased by 25% =
37. 37.225 decreased by 12% =
38. 38.588 decreased by 75% =
39. 39.772 decreased by 25% =
40. 40.260 increased by 5% =

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