← Percentages in seconds lesson New set →

Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 40 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.15% of 730 =
  2. 2.10% of 100 =
  3. 3.1% of 260 =
  4. 4.5% of 110 =
  5. 5.20% of 690 =
  6. 6.50% of 770 =
  7. 7.50% of 540 =
  8. 8.10% of 520 =
  9. 9.25% of 610 =
  10. 10.5% of 20 =
  11. 11.15% of 40 =
  12. 12.5% of 30 =
  13. 13.15% of 690 =
  14. 14.20% of 670 =
  15. 15.50% of 770 =
  16. 16.5% of 450 =
  17. 17.15% of 450 =
  18. 18.1% of 530 =
  19. 19.5% of 170 =
  20. 20.10% of 820 =
  21. 21.20% of 140 =
  22. 22.5% of 170 =
  23. 23.5% of 690 =
  24. 24.5% of 730 =
  25. 25.10% of 600 =
  26. 26.50% of 880 =
  27. 27.1% of 50 =
  28. 28.5% of 40 =
  29. 29.25% of 100 =
  30. 30.10% of 80 =
  31. 31.15% of 430 =
  32. 32.15% of 100 =
  33. 33.15% of 640 =
  34. 34.5% of 70 =
  35. 35.15% of 740 =
  36. 36.5% of 540 =
  37. 37.25% of 640 =
  38. 38.50% of 480 =
  39. 39.1% of 660 =
  40. 40.20% of 530 =

Answer key

  1. 109.5
  2. 10
  3. 2.6
  4. 5.5
  5. 138
  6. 385
  7. 270
  8. 52
  9. 152.5
  10. 1
  11. 6
  12. 1.5
  13. 103.5
  14. 134
  15. 385
  16. 22.5
  17. 67.5
  18. 5.3
  19. 8.5
  20. 82
  21. 28
  22. 8.5
  23. 34.5
  24. 36.5
  25. 60
  26. 440
  27. 0.5
  28. 2
  29. 25
  30. 8
  31. 64.5
  32. 15
  33. 96
  34. 3.5
  35. 111
  36. 27
  37. 160
  38. 240
  39. 6.6
  40. 106

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