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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 761 · 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. 1.20% of 600 =
  2. 2.10% of 780 =
  3. 3.5% of 280 =
  4. 4.15% of 520 =
  5. 5.10% of 600 =
  6. 6.5% of 780 =
  7. 7.50% of 180 =
  8. 8.20% of 580 =
  9. 9.20% of 880 =
  10. 10.50% of 60 =
  11. 11.1% of 160 =
  12. 12.15% of 730 =
  13. 13.20% of 460 =
  14. 14.25% of 490 =
  15. 15.25% of 160 =
  16. 16.5% of 890 =
  17. 17.5% of 100 =
  18. 18.15% of 790 =
  19. 19.1% of 750 =
  20. 20.5% of 870 =
  21. 21.10% of 510 =
  22. 22.15% of 100 =
  23. 23.5% of 90 =
  24. 24.20% of 390 =
  25. 25.5% of 770 =
  26. 26.25% of 280 =
  27. 27.50% of 780 =
  28. 28.50% of 50 =
  29. 29.1% of 370 =
  30. 30.10% of 780 =
  31. 31.10% of 520 =
  32. 32.15% of 870 =
  33. 33.1% of 540 =
  34. 34.5% of 590 =
  35. 35.50% of 240 =
  36. 36.20% of 70 =
  37. 37.1% of 880 =
  38. 38.5% of 410 =
  39. 39.25% of 860 =
  40. 40.1% of 170 =

Answer key

  1. 120
  2. 78
  3. 14
  4. 78
  5. 60
  6. 39
  7. 90
  8. 116
  9. 176
  10. 30
  11. 1.6
  12. 109.5
  13. 92
  14. 122.5
  15. 40
  16. 44.5
  17. 5
  18. 118.5
  19. 7.5
  20. 43.5
  21. 51
  22. 15
  23. 4.5
  24. 78
  25. 38.5
  26. 70
  27. 390
  28. 25
  29. 3.7
  30. 78
  31. 52
  32. 130.5
  33. 5.4
  34. 29.5
  35. 120
  36. 14
  37. 8.8
  38. 20.5
  39. 215
  40. 1.7

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