← Percentages in seconds lesson New set →

Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 821 · 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. 1.5% of 850 =
  2. 2.5% of 830 =
  3. 3.1% of 890 =
  4. 4.10% of 110 =
  5. 5.5% of 360 =
  6. 6.15% of 760 =
  7. 7.25% of 50 =
  8. 8.15% of 700 =
  9. 9.15% of 220 =
  10. 10.20% of 620 =
  11. 11.5% of 20 =
  12. 12.20% of 30 =
  13. 13.20% of 310 =
  14. 14.15% of 100 =
  15. 15.5% of 570 =
  16. 16.10% of 50 =
  17. 17.20% of 600 =
  18. 18.15% of 180 =
  19. 19.5% of 430 =
  20. 20.50% of 760 =
  21. 21.15% of 680 =
  22. 22.50% of 270 =
  23. 23.1% of 860 =
  24. 24.20% of 610 =
  25. 25.25% of 120 =
  26. 26.15% of 720 =
  27. 27.5% of 570 =
  28. 28.1% of 230 =
  29. 29.50% of 210 =
  30. 30.5% of 880 =
  31. 31.10% of 110 =
  32. 32.1% of 320 =
  33. 33.5% of 840 =
  34. 34.5% of 820 =
  35. 35.20% of 220 =
  36. 36.1% of 30 =
  37. 37.5% of 820 =
  38. 38.1% of 370 =
  39. 39.25% of 470 =
  40. 40.15% of 310 =

Answer key

  1. 42.5
  2. 41.5
  3. 8.9
  4. 11
  5. 18
  6. 114
  7. 12.5
  8. 105
  9. 33
  10. 124
  11. 1
  12. 6
  13. 62
  14. 15
  15. 28.5
  16. 5
  17. 120
  18. 27
  19. 21.5
  20. 380
  21. 102
  22. 135
  23. 8.6
  24. 122
  25. 30
  26. 108
  27. 28.5
  28. 2.3
  29. 105
  30. 44
  31. 11
  32. 3.2
  33. 42
  34. 41
  35. 44
  36. 0.3
  37. 41
  38. 3.7
  39. 117.5
  40. 46.5

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