Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 64 · 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. 1.520 decreased by 15% =
2. 2.100 decreased by 35% =
3. 3.260 increased by 20% =
4. 4.560 decreased by 75% =
5. 5.195 decreased by 40% =
6. 6.750 increased by 20% =
7. 7.660 increased by 5% =
8. 8.120 increased by 5% =
9. 9.690 increased by 30% =
10. 10.440 increased by 10% =
11. 11.155 decreased by 20% =
12. 12.340 decreased by 5% =
13. 13.50 decreased by 12% =
14. 14.626 increased by 50% =
15. 15.70 decreased by 50% =
16. 16.614 decreased by 50% =
17. 17.145 increased by 40% =
18. 18.140 increased by 5% =
19. 19.166 decreased by 50% =
20. 20.380 decreased by 75% =
21. 21.500 increased by 12% =
22. 22.660 increased by 35% =
23. 23.560 increased by 15% =
24. 24.114 decreased by 50% =
25. 25.480 decreased by 10% =
26. 26.320 increased by 25% =
27. 27.180 decreased by 5% =
28. 28.620 decreased by 30% =
29. 29.392 decreased by 50% =
30. 30.700 decreased by 12% =
31. 31.460 increased by 5% =
32. 32.225 increased by 60% =
33. 33.110 increased by 30% =
34. 34.100 increased by 12% =
35. 35.330 increased by 20% =
36. 36.140 decreased by 75% =
37. 37.332 increased by 75% =
38. 38.144 increased by 50% =
39. 39.280 increased by 75% =
40. 40.620 increased by 5% =

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