Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 697 · 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. 1.600 increased by 35% =
2. 2.460 decreased by 5% =
3. 3.500 decreased by 30% =
4. 4.310 increased by 60% =
5. 5.400 increased by 8% =
6. 6.795 decreased by 60% =
7. 7.660 decreased by 30% =
8. 8.610 increased by 40% =
9. 9.760 increased by 40% =
10. 10.775 decreased by 40% =
11. 11.284 increased by 50% =
12. 12.445 decreased by 60% =
13. 13.730 decreased by 60% =
14. 14.312 increased by 25% =
15. 15.355 increased by 40% =
16. 16.698 increased by 50% =
17. 17.425 decreased by 8% =
18. 18.460 decreased by 35% =
19. 19.540 increased by 10% =
20. 20.380 decreased by 15% =
21. 21.140 increased by 15% =
22. 22.288 increased by 25% =
23. 23.250 decreased by 30% =
24. 24.535 increased by 40% =
25. 25.595 decreased by 20% =
26. 26.600 decreased by 8% =
27. 27.80 increased by 5% =
28. 28.800 decreased by 5% =
29. 29.700 decreased by 10% =
30. 30.120 increased by 20% =
31. 31.100 increased by 12% =
32. 32.600 decreased by 15% =
33. 33.120 increased by 10% =
34. 34.360 increased by 60% =
35. 35.460 decreased by 5% =
36. 36.198 decreased by 50% =
37. 37.380 decreased by 40% =
38. 38.160 increased by 35% =
39. 39.280 decreased by 5% =
40. 40.715 decreased by 20% =

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