Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 622 · 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. 1.276 increased by 50% =
2. 2.700 decreased by 20% =
3. 3.120 decreased by 20% =
4. 4.705 increased by 40% =
5. 5.530 decreased by 30% =
6. 6.265 decreased by 60% =
7. 7.795 increased by 60% =
8. 8.160 increased by 25% =
9. 9.800 decreased by 12% =
10. 10.300 decreased by 15% =
11. 11.255 increased by 20% =
12. 12.525 increased by 12% =
13. 13.200 increased by 25% =
14. 14.775 decreased by 12% =
15. 15.40 decreased by 5% =
16. 16.448 decreased by 50% =
17. 17.90 decreased by 10% =
18. 18.204 decreased by 25% =
19. 19.760 increased by 5% =
20. 20.400 decreased by 10% =
21. 21.680 increased by 40% =
22. 22.100 decreased by 8% =
23. 23.300 increased by 5% =
24. 24.720 increased by 35% =
25. 25.150 increased by 10% =
26. 26.60 decreased by 35% =
27. 27.176 increased by 50% =
28. 28.190 increased by 30% =
29. 29.470 increased by 40% =
30. 30.185 increased by 60% =
31. 31.75 increased by 8% =
32. 32.675 increased by 12% =
33. 33.460 decreased by 30% =
34. 34.520 decreased by 35% =
35. 35.175 decreased by 8% =
36. 36.740 increased by 20% =
37. 37.475 decreased by 20% =
38. 38.275 increased by 12% =
39. 39.565 decreased by 20% =
40. 40.152 increased by 25% =

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