Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 923 · 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. 1.500 increased by 12% =
2. 2.725 decreased by 8% =
3. 3.45 decreased by 60% =
4. 4.435 increased by 60% =
5. 5.512 increased by 50% =
6. 6.445 increased by 40% =
7. 7.200 increased by 15% =
8. 8.280 increased by 5% =
9. 9.200 increased by 50% =
10. 10.40 decreased by 35% =
11. 11.280 increased by 15% =
12. 12.420 decreased by 5% =
13. 13.760 decreased by 35% =
14. 14.635 decreased by 40% =
15. 15.300 increased by 75% =
16. 16.400 decreased by 8% =
17. 17.280 increased by 15% =
18. 18.500 increased by 30% =
19. 19.600 decreased by 35% =
20. 20.135 increased by 60% =
21. 21.200 decreased by 35% =
22. 22.346 increased by 50% =
23. 23.705 decreased by 60% =
24. 24.710 decreased by 40% =
25. 25.340 decreased by 5% =
26. 26.200 increased by 40% =
27. 27.620 increased by 15% =
28. 28.148 decreased by 25% =
29. 29.280 increased by 30% =
30. 30.60 decreased by 20% =
31. 31.366 increased by 50% =
32. 32.560 increased by 5% =
33. 33.198 increased by 50% =
34. 34.312 decreased by 25% =
35. 35.300 decreased by 15% =
36. 36.596 decreased by 75% =
37. 37.400 increased by 25% =
38. 38.320 decreased by 5% =
39. 39.320 decreased by 5% =
40. 40.550 increased by 40% =

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