Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 747 · 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. 1.700 increased by 25% =
2. 2.100 increased by 40% =
3. 3.725 decreased by 12% =
4. 4.628 increased by 25% =
5. 5.380 decreased by 5% =
6. 6.200 increased by 30% =
7. 7.124 decreased by 25% =
8. 8.510 decreased by 60% =
9. 9.200 increased by 15% =
10. 10.140 decreased by 30% =
11. 11.565 decreased by 20% =
12. 12.364 decreased by 25% =
13. 13.620 decreased by 5% =
14. 14.660 increased by 75% =
15. 15.240 increased by 30% =
16. 16.150 increased by 12% =
17. 17.524 decreased by 25% =
18. 18.220 increased by 5% =
19. 19.306 increased by 50% =
20. 20.640 decreased by 15% =
21. 21.712 increased by 25% =
22. 22.240 increased by 20% =
23. 23.464 decreased by 25% =
24. 24.725 increased by 20% =
25. 25.140 decreased by 15% =
26. 26.212 increased by 25% =
27. 27.608 decreased by 75% =
28. 28.455 increased by 40% =
29. 29.140 decreased by 35% =
30. 30.530 increased by 20% =
31. 31.80 increased by 60% =
32. 32.220 increased by 10% =
33. 33.360 decreased by 5% =
34. 34.524 increased by 25% =
35. 35.92 decreased by 75% =
36. 36.300 decreased by 8% =
37. 37.500 increased by 8% =
38. 38.190 decreased by 20% =
39. 39.795 decreased by 60% =
40. 40.72 increased by 25% =

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