Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 168 · 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. 1.660 increased by 35% =
2. 2.250 increased by 12% =
3. 3.740 decreased by 15% =
4. 4.85 increased by 60% =
5. 5.605 increased by 40% =
6. 6.250 increased by 40% =
7. 7.628 increased by 75% =
8. 8.328 increased by 75% =
9. 9.520 decreased by 35% =
10. 10.650 increased by 30% =
11. 11.775 increased by 12% =
12. 12.50 decreased by 12% =
13. 13.115 decreased by 20% =
14. 14.240 decreased by 50% =
15. 15.300 increased by 8% =
16. 16.748 increased by 75% =
17. 17.540 increased by 50% =
18. 18.180 decreased by 10% =
19. 19.215 decreased by 20% =
20. 20.506 decreased by 50% =
21. 21.780 increased by 5% =
22. 22.760 decreased by 60% =
23. 23.240 increased by 35% =
24. 24.620 decreased by 5% =
25. 25.200 decreased by 15% =
26. 26.665 decreased by 40% =
27. 27.250 decreased by 12% =
28. 28.432 increased by 25% =
29. 29.340 increased by 15% =
30. 30.655 increased by 60% =
31. 31.605 decreased by 40% =
32. 32.160 decreased by 30% =
33. 33.340 increased by 15% =
34. 34.380 decreased by 5% =
35. 35.490 increased by 10% =
36. 36.220 increased by 5% =
37. 37.200 increased by 25% =
38. 38.230 increased by 20% =
39. 39.465 increased by 60% =
40. 40.600 increased by 5% =

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