← Percentages in seconds lesson New set →

Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 851 · 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. 1.10% of 190 =
  2. 2.5% of 840 =
  3. 3.1% of 230 =
  4. 4.10% of 400 =
  5. 5.5% of 520 =
  6. 6.50% of 730 =
  7. 7.50% of 20 =
  8. 8.5% of 330 =
  9. 9.5% of 190 =
  10. 10.25% of 510 =
  11. 11.10% of 50 =
  12. 12.1% of 750 =
  13. 13.5% of 250 =
  14. 14.15% of 660 =
  15. 15.10% of 270 =
  16. 16.15% of 210 =
  17. 17.5% of 790 =
  18. 18.20% of 280 =
  19. 19.5% of 300 =
  20. 20.50% of 310 =
  21. 21.1% of 780 =
  22. 22.10% of 210 =
  23. 23.1% of 480 =
  24. 24.5% of 880 =
  25. 25.15% of 330 =
  26. 26.50% of 470 =
  27. 27.10% of 120 =
  28. 28.10% of 20 =
  29. 29.1% of 630 =
  30. 30.15% of 130 =
  31. 31.1% of 820 =
  32. 32.25% of 50 =
  33. 33.50% of 880 =
  34. 34.25% of 50 =
  35. 35.50% of 200 =
  36. 36.20% of 580 =
  37. 37.15% of 30 =
  38. 38.1% of 850 =
  39. 39.5% of 720 =
  40. 40.15% of 720 =

Answer key

  1. 19
  2. 42
  3. 2.3
  4. 40
  5. 26
  6. 365
  7. 10
  8. 16.5
  9. 9.5
  10. 127.5
  11. 5
  12. 7.5
  13. 12.5
  14. 99
  15. 27
  16. 31.5
  17. 39.5
  18. 56
  19. 15
  20. 155
  21. 7.8
  22. 21
  23. 4.8
  24. 44
  25. 49.5
  26. 235
  27. 12
  28. 2
  29. 6.3
  30. 19.5
  31. 8.2
  32. 12.5
  33. 440
  34. 12.5
  35. 100
  36. 116
  37. 4.5
  38. 8.5
  39. 36
  40. 108

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