Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 828 · 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. 1.160 decreased by 10% =
2. 2.595 increased by 40% =
3. 3.360 increased by 30% =
4. 4.460 decreased by 35% =
5. 5.200 increased by 15% =
6. 6.625 decreased by 8% =
7. 7.168 decreased by 75% =
8. 8.75 decreased by 60% =
9. 9.792 increased by 25% =
10. 10.776 decreased by 75% =
11. 11.750 increased by 12% =
12. 12.102 increased by 50% =
13. 13.40 decreased by 60% =
14. 14.800 increased by 12% =
15. 15.650 decreased by 8% =
16. 16.436 decreased by 25% =
17. 17.260 increased by 60% =
18. 18.200 decreased by 8% =
19. 19.415 decreased by 20% =
20. 20.280 increased by 35% =
21. 21.45 increased by 40% =
22. 22.425 increased by 8% =
23. 23.695 increased by 20% =
24. 24.140 decreased by 10% =
25. 25.700 decreased by 35% =
26. 26.144 increased by 50% =
27. 27.200 decreased by 12% =
28. 28.235 increased by 40% =
29. 29.112 decreased by 50% =
30. 30.200 increased by 25% =
31. 31.186 decreased by 50% =
32. 32.60 increased by 5% =
33. 33.590 increased by 20% =
34. 34.210 decreased by 30% =
35. 35.430 increased by 30% =
36. 36.780 increased by 5% =
37. 37.400 increased by 15% =
38. 38.506 increased by 50% =
39. 39.380 decreased by 35% =
40. 40.132 increased by 50% =

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