Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 618 · 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. 1.708 increased by 50% =
2. 2.55 increased by 60% =
3. 3.320 increased by 35% =
4. 4.404 decreased by 25% =
5. 5.564 decreased by 50% =
6. 6.595 decreased by 20% =
7. 7.170 increased by 10% =
8. 8.140 increased by 5% =
9. 9.390 increased by 10% =
10. 10.570 increased by 10% =
11. 11.660 decreased by 35% =
12. 12.740 increased by 5% =
13. 13.312 increased by 25% =
14. 14.120 decreased by 20% =
15. 15.175 increased by 8% =
16. 16.140 increased by 5% =
17. 17.620 increased by 60% =
18. 18.65 decreased by 60% =
19. 19.120 decreased by 35% =
20. 20.212 decreased by 50% =
21. 21.225 increased by 12% =
22. 22.600 increased by 12% =
23. 23.375 increased by 12% =
24. 24.580 decreased by 20% =
25. 25.240 decreased by 5% =
26. 26.560 decreased by 35% =
27. 27.230 decreased by 10% =
28. 28.700 decreased by 35% =
29. 29.640 increased by 15% =
30. 30.310 increased by 60% =
31. 31.580 increased by 15% =
32. 32.360 increased by 30% =
33. 33.625 increased by 8% =
34. 34.740 increased by 35% =
35. 35.568 decreased by 25% =
36. 36.575 decreased by 8% =
37. 37.40 increased by 5% =
38. 38.400 increased by 25% =
39. 39.450 decreased by 8% =
40. 40.260 decreased by 60% =

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