Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 352 · 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. 1.440 increased by 5% =
2. 2.120 increased by 5% =
3. 3.730 increased by 30% =
4. 4.500 increased by 40% =
5. 5.300 decreased by 8% =
6. 6.100 decreased by 15% =
7. 7.375 decreased by 8% =
8. 8.460 decreased by 15% =
9. 9.300 decreased by 12% =
10. 10.425 decreased by 12% =
11. 11.720 decreased by 50% =
12. 12.350 increased by 30% =
13. 13.732 increased by 25% =
14. 14.255 increased by 40% =
15. 15.710 increased by 60% =
16. 16.375 decreased by 12% =
17. 17.760 decreased by 10% =
18. 18.250 increased by 30% =
19. 19.140 increased by 20% =
20. 20.360 decreased by 10% =
21. 21.210 decreased by 10% =
22. 22.96 increased by 25% =
23. 23.695 decreased by 40% =
24. 24.100 decreased by 30% =
25. 25.420 increased by 35% =
26. 26.400 decreased by 35% =
27. 27.200 increased by 12% =
28. 28.800 decreased by 12% =
29. 29.700 decreased by 35% =
30. 30.432 increased by 75% =
31. 31.720 increased by 5% =
32. 32.145 decreased by 40% =
33. 33.120 increased by 15% =
34. 34.430 increased by 20% =
35. 35.476 increased by 75% =
36. 36.60 decreased by 30% =
37. 37.400 decreased by 35% =
38. 38.425 increased by 8% =
39. 39.148 increased by 75% =
40. 40.480 increased by 35% =

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