Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 605 · 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. 1.200 increased by 25% =
2. 2.140 decreased by 5% =
3. 3.400 decreased by 12% =
4. 4.255 increased by 60% =
5. 5.295 decreased by 40% =
6. 6.72 increased by 25% =
7. 7.475 increased by 8% =
8. 8.255 increased by 60% =
9. 9.630 increased by 60% =
10. 10.568 decreased by 75% =
11. 11.705 decreased by 60% =
12. 12.280 increased by 10% =
13. 13.135 decreased by 20% =
14. 14.710 increased by 10% =
15. 15.800 increased by 75% =
16. 16.180 decreased by 5% =
17. 17.208 decreased by 50% =
18. 18.800 decreased by 10% =
19. 19.340 increased by 30% =
20. 20.750 decreased by 8% =
21. 21.670 increased by 20% =
22. 22.50 decreased by 12% =
23. 23.300 decreased by 30% =
24. 24.460 increased by 10% =
25. 25.230 decreased by 10% =
26. 26.390 decreased by 10% =
27. 27.570 decreased by 10% =
28. 28.620 increased by 10% =
29. 29.125 decreased by 8% =
30. 30.700 decreased by 20% =
31. 31.575 decreased by 60% =
32. 32.76 increased by 50% =
33. 33.435 increased by 20% =
34. 34.368 decreased by 75% =
35. 35.532 increased by 75% =
36. 36.145 decreased by 40% =
37. 37.560 increased by 15% =
38. 38.180 increased by 15% =
39. 39.480 decreased by 5% =
40. 40.775 decreased by 12% =

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