Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 575 · 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. 1.430 increased by 10% =
2. 2.250 increased by 12% =
3. 3.160 increased by 15% =
4. 4.275 increased by 12% =
5. 5.310 decreased by 30% =
6. 6.205 decreased by 60% =
7. 7.695 decreased by 20% =
8. 8.48 decreased by 25% =
9. 9.430 decreased by 10% =
10. 10.310 decreased by 20% =
11. 11.410 decreased by 10% =
12. 12.430 decreased by 20% =
13. 13.740 decreased by 10% =
14. 14.280 increased by 35% =
15. 15.575 increased by 8% =
16. 16.90 decreased by 40% =
17. 17.45 increased by 20% =
18. 18.350 decreased by 40% =
19. 19.356 increased by 25% =
20. 20.348 increased by 25% =
21. 21.575 increased by 12% =
22. 22.200 increased by 35% =
23. 23.300 decreased by 10% =
24. 24.530 increased by 30% =
25. 25.82 increased by 50% =
26. 26.440 decreased by 10% =
27. 27.100 increased by 5% =
28. 28.780 increased by 5% =
29. 29.75 increased by 12% =
30. 30.625 decreased by 12% =
31. 31.570 increased by 10% =
32. 32.440 increased by 10% =
33. 33.480 increased by 10% =
34. 34.800 decreased by 25% =
35. 35.332 decreased by 50% =
36. 36.560 decreased by 30% =
37. 37.460 decreased by 75% =
38. 38.800 increased by 40% =
39. 39.540 decreased by 35% =
40. 40.130 decreased by 30% =

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