Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 272 · 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. 1.455 decreased by 60% =
2. 2.280 decreased by 30% =
3. 3.440 decreased by 15% =
4. 4.535 increased by 40% =
5. 5.552 decreased by 50% =
6. 6.340 decreased by 5% =
7. 7.140 decreased by 35% =
8. 8.190 decreased by 10% =
9. 9.746 decreased by 50% =
10. 10.128 decreased by 75% =
11. 11.690 decreased by 50% =
12. 12.75 increased by 12% =
13. 13.400 increased by 15% =
14. 14.186 increased by 50% =
15. 15.704 decreased by 75% =
16. 16.160 increased by 5% =
17. 17.80 decreased by 20% =
18. 18.750 increased by 12% =
19. 19.200 decreased by 35% =
20. 20.590 decreased by 60% =
21. 21.115 increased by 60% =
22. 22.140 decreased by 30% =
23. 23.360 increased by 60% =
24. 24.425 increased by 12% =
25. 25.752 decreased by 75% =
26. 26.650 decreased by 12% =
27. 27.360 increased by 20% =
28. 28.500 increased by 5% =
29. 29.780 increased by 15% =
30. 30.760 decreased by 35% =
31. 31.740 increased by 35% =
32. 32.475 increased by 12% =
33. 33.564 decreased by 25% =
34. 34.364 increased by 50% =
35. 35.770 decreased by 30% =
36. 36.750 decreased by 30% =
37. 37.166 decreased by 50% =
38. 38.40 decreased by 35% =
39. 39.55 decreased by 20% =
40. 40.640 increased by 10% =

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths