Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 674 · 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. 1.362 increased by 50% =
2. 2.50 increased by 20% =
3. 3.475 decreased by 8% =
4. 4.675 decreased by 8% =
5. 5.400 increased by 5% =
6. 6.440 decreased by 10% =
7. 7.150 decreased by 8% =
8. 8.700 decreased by 60% =
9. 9.380 decreased by 35% =
10. 10.375 decreased by 60% =
11. 11.638 decreased by 50% =
12. 12.516 decreased by 75% =
13. 13.320 decreased by 30% =
14. 14.622 increased by 50% =
15. 15.360 increased by 35% =
16. 16.770 decreased by 60% =
17. 17.184 decreased by 75% =
18. 18.410 increased by 30% =
19. 19.75 decreased by 12% =
20. 20.380 increased by 5% =
21. 21.285 increased by 40% =
22. 22.170 increased by 40% =
23. 23.780 decreased by 35% =
24. 24.620 increased by 30% =
25. 25.100 decreased by 8% =
26. 26.520 increased by 35% =
27. 27.420 decreased by 35% =
28. 28.440 increased by 15% =
29. 29.645 decreased by 40% =
30. 30.495 decreased by 20% =
31. 31.740 decreased by 5% =
32. 32.200 increased by 8% =
33. 33.100 decreased by 35% =
34. 34.300 decreased by 60% =
35. 35.170 increased by 10% =
36. 36.40 increased by 35% =
37. 37.300 decreased by 15% =
38. 38.50 increased by 10% =
39. 39.275 decreased by 12% =
40. 40.100 decreased by 30% =

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