Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 919 · 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. 1.125 increased by 12% =
2. 2.560 decreased by 15% =
3. 3.240 increased by 30% =
4. 4.560 increased by 20% =
5. 5.392 increased by 75% =
6. 6.75 increased by 12% =
7. 7.60 decreased by 15% =
8. 8.200 decreased by 20% =
9. 9.255 increased by 20% =
10. 10.560 increased by 60% =
11. 11.175 increased by 12% =
12. 12.650 increased by 12% =
13. 13.540 increased by 60% =
14. 14.140 increased by 15% =
15. 15.88 decreased by 75% =
16. 16.115 increased by 20% =
17. 17.265 decreased by 40% =
18. 18.592 decreased by 75% =
19. 19.756 decreased by 50% =
20. 20.150 increased by 40% =
21. 21.248 decreased by 50% =
22. 22.375 increased by 40% =
23. 23.780 decreased by 5% =
24. 24.360 decreased by 5% =
25. 25.720 increased by 5% =
26. 26.582 decreased by 50% =
27. 27.580 decreased by 75% =
28. 28.300 increased by 10% =
29. 29.200 decreased by 12% =
30. 30.50 increased by 40% =
31. 31.220 increased by 5% =
32. 32.240 increased by 35% =
33. 33.90 decreased by 60% =
34. 34.172 increased by 25% =
35. 35.225 increased by 60% =
36. 36.65 increased by 60% =
37. 37.440 decreased by 35% =
38. 38.205 decreased by 60% =
39. 39.142 decreased by 50% =
40. 40.550 increased by 60% =

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