Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 521 · 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. 1.760 increased by 10% =
2. 2.450 increased by 12% =
3. 3.300 decreased by 5% =
4. 4.460 increased by 30% =
5. 5.720 decreased by 60% =
6. 6.620 increased by 5% =
7. 7.760 increased by 10% =
8. 8.110 increased by 30% =
9. 9.240 increased by 15% =
10. 10.400 increased by 5% =
11. 11.760 increased by 35% =
12. 12.740 increased by 40% =
13. 13.610 increased by 60% =
14. 14.72 increased by 50% =
15. 15.375 increased by 12% =
16. 16.400 decreased by 8% =
17. 17.220 increased by 15% =
18. 18.720 increased by 15% =
19. 19.260 increased by 5% =
20. 20.125 decreased by 8% =
21. 21.100 increased by 60% =
22. 22.610 decreased by 20% =
23. 23.732 increased by 25% =
24. 24.580 increased by 15% =
25. 25.380 increased by 40% =
26. 26.595 decreased by 40% =
27. 27.800 increased by 8% =
28. 28.400 increased by 30% =
29. 29.600 decreased by 35% =
30. 30.760 decreased by 5% =
31. 31.276 increased by 75% =
32. 32.330 decreased by 40% =
33. 33.272 decreased by 75% =
34. 34.392 increased by 25% =
35. 35.640 increased by 25% =
36. 36.425 increased by 12% =
37. 37.100 decreased by 30% =
38. 38.175 decreased by 8% =
39. 39.65 increased by 60% =
40. 40.490 increased by 10% =

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