← Percentages in seconds lesson New set →

Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 631 · 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 280 =
  2. 2.1% of 120 =
  3. 3.50% of 100 =
  4. 4.10% of 60 =
  5. 5.10% of 460 =
  6. 6.10% of 130 =
  7. 7.5% of 880 =
  8. 8.25% of 890 =
  9. 9.50% of 100 =
  10. 10.10% of 470 =
  11. 11.25% of 760 =
  12. 12.20% of 190 =
  13. 13.5% of 330 =
  14. 14.15% of 540 =
  15. 15.25% of 680 =
  16. 16.25% of 590 =
  17. 17.5% of 140 =
  18. 18.10% of 760 =
  19. 19.1% of 250 =
  20. 20.5% of 270 =
  21. 21.5% of 750 =
  22. 22.1% of 720 =
  23. 23.20% of 710 =
  24. 24.50% of 30 =
  25. 25.10% of 580 =
  26. 26.20% of 250 =
  27. 27.1% of 430 =
  28. 28.15% of 20 =
  29. 29.20% of 90 =
  30. 30.5% of 670 =
  31. 31.10% of 460 =
  32. 32.15% of 130 =
  33. 33.15% of 620 =
  34. 34.20% of 400 =
  35. 35.15% of 600 =
  36. 36.10% of 320 =
  37. 37.1% of 120 =
  38. 38.1% of 860 =
  39. 39.10% of 700 =
  40. 40.1% of 500 =

Answer key

  1. 42
  2. 1.2
  3. 50
  4. 6
  5. 46
  6. 13
  7. 44
  8. 222.5
  9. 50
  10. 47
  11. 190
  12. 38
  13. 16.5
  14. 81
  15. 170
  16. 147.5
  17. 7
  18. 76
  19. 2.5
  20. 13.5
  21. 37.5
  22. 7.2
  23. 142
  24. 15
  25. 58
  26. 50
  27. 4.3
  28. 3
  29. 18
  30. 33.5
  31. 46
  32. 19.5
  33. 93
  34. 80
  35. 90
  36. 32
  37. 1.2
  38. 8.6
  39. 70
  40. 5

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