Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 196 · 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. 1.480 increased by 15% =
2. 2.80 increased by 25% =
3. 3.436 increased by 75% =
4. 4.140 decreased by 10% =
5. 5.468 increased by 25% =
6. 6.172 decreased by 25% =
7. 7.455 increased by 20% =
8. 8.440 increased by 35% =
9. 9.575 increased by 12% =
10. 10.800 increased by 8% =
11. 11.605 decreased by 60% =
12. 12.250 decreased by 40% =
13. 13.700 increased by 5% =
14. 14.784 increased by 50% =
15. 15.654 increased by 50% =
16. 16.210 increased by 10% =
17. 17.588 decreased by 75% =
18. 18.550 decreased by 12% =
19. 19.530 decreased by 40% =
20. 20.120 increased by 5% =
21. 21.788 decreased by 25% =
22. 22.788 increased by 25% =
23. 23.700 increased by 5% =
24. 24.620 decreased by 15% =
25. 25.386 increased by 50% =
26. 26.200 decreased by 8% =
27. 27.240 decreased by 15% =
28. 28.520 increased by 15% =
29. 29.716 decreased by 50% =
30. 30.580 increased by 35% =
31. 31.700 decreased by 8% =
32. 32.280 increased by 15% =
33. 33.390 increased by 20% =
34. 34.316 decreased by 75% =
35. 35.600 decreased by 5% =
36. 36.750 increased by 8% =
37. 37.150 decreased by 10% =
38. 38.660 increased by 50% =
39. 39.255 decreased by 40% =
40. 40.400 decreased by 15% =

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