Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 927 · 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. 1.576 increased by 50% =
2. 2.215 decreased by 40% =
3. 3.304 decreased by 75% =
4. 4.40 decreased by 35% =
5. 5.360 decreased by 35% =
6. 6.480 increased by 5% =
7. 7.340 increased by 60% =
8. 8.660 decreased by 5% =
9. 9.400 decreased by 15% =
10. 10.650 decreased by 10% =
11. 11.180 decreased by 5% =
12. 12.475 increased by 40% =
13. 13.650 increased by 8% =
14. 14.445 increased by 60% =
15. 15.650 increased by 12% =
16. 16.580 increased by 30% =
17. 17.710 increased by 10% =
18. 18.540 increased by 20% =
19. 19.775 increased by 12% =
20. 20.680 increased by 40% =
21. 21.740 decreased by 15% =
22. 22.230 increased by 10% =
23. 23.350 increased by 30% =
24. 24.128 decreased by 75% =
25. 25.195 decreased by 40% =
26. 26.240 increased by 60% =
27. 27.275 decreased by 12% =
28. 28.75 increased by 12% =
29. 29.275 increased by 20% =
30. 30.60 decreased by 5% =
31. 31.720 increased by 30% =
32. 32.745 increased by 60% =
33. 33.550 increased by 30% =
34. 34.472 decreased by 75% =
35. 35.176 increased by 25% =
36. 36.440 decreased by 10% =
37. 37.750 decreased by 12% =
38. 38.260 increased by 35% =
39. 39.690 increased by 20% =
40. 40.335 increased by 40% =

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