Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 922 · 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. 1.475 increased by 40% =
2. 2.188 decreased by 75% =
3. 3.800 increased by 75% =
4. 4.750 increased by 10% =
5. 5.500 increased by 35% =
6. 6.745 increased by 40% =
7. 7.760 decreased by 15% =
8. 8.620 decreased by 35% =
9. 9.600 increased by 8% =
10. 10.95 decreased by 60% =
11. 11.800 increased by 12% =
12. 12.314 increased by 50% =
13. 13.470 decreased by 10% =
14. 14.560 decreased by 5% =
15. 15.672 increased by 75% =
16. 16.135 increased by 20% =
17. 17.360 increased by 35% =
18. 18.370 increased by 10% =
19. 19.430 decreased by 30% =
20. 20.50 decreased by 10% =
21. 21.495 decreased by 60% =
22. 22.120 increased by 35% =
23. 23.320 decreased by 5% =
24. 24.636 increased by 25% =
25. 25.225 increased by 8% =
26. 26.715 increased by 40% =
27. 27.232 decreased by 25% =
28. 28.220 decreased by 50% =
29. 29.720 increased by 15% =
30. 30.60 increased by 35% =
31. 31.160 decreased by 30% =
32. 32.260 decreased by 30% =
33. 33.470 increased by 40% =
34. 34.470 increased by 50% =
35. 35.600 increased by 40% =
36. 36.240 decreased by 50% =
37. 37.500 decreased by 5% =
38. 38.260 decreased by 15% =
39. 39.128 decreased by 25% =
40. 40.580 increased by 30% =

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