Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 176 · 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 35% =
2. 2.235 decreased by 20% =
3. 3.760 increased by 35% =
4. 4.435 increased by 20% =
5. 5.40 increased by 15% =
6. 6.380 decreased by 15% =
7. 7.298 increased by 50% =
8. 8.680 decreased by 15% =
9. 9.725 increased by 8% =
10. 10.240 decreased by 25% =
11. 11.230 increased by 30% =
12. 12.796 decreased by 25% =
13. 13.460 increased by 75% =
14. 14.100 increased by 35% =
15. 15.740 decreased by 60% =
16. 16.560 increased by 15% =
17. 17.540 increased by 5% =
18. 18.420 increased by 35% =
19. 19.135 decreased by 20% =
20. 20.448 increased by 50% =
21. 21.150 decreased by 30% =
22. 22.620 decreased by 5% =
23. 23.375 increased by 12% =
24. 24.130 increased by 20% =
25. 25.200 decreased by 15% =
26. 26.760 decreased by 30% =
27. 27.400 decreased by 12% =
28. 28.465 decreased by 20% =
29. 29.720 increased by 30% =
30. 30.170 decreased by 10% =
31. 31.250 decreased by 8% =
32. 32.480 decreased by 5% =
33. 33.528 decreased by 50% =
34. 34.745 decreased by 60% =
35. 35.650 decreased by 30% =
36. 36.560 increased by 60% =
37. 37.752 increased by 25% =
38. 38.425 increased by 12% =
39. 39.435 decreased by 20% =
40. 40.125 decreased by 8% =

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