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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 696 · 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 370 =
  2. 2.10% of 100 =
  3. 3.1% of 200 =
  4. 4.1% of 330 =
  5. 5.25% of 840 =
  6. 6.20% of 250 =
  7. 7.15% of 700 =
  8. 8.15% of 720 =
  9. 9.5% of 290 =
  10. 10.50% of 390 =
  11. 11.50% of 770 =
  12. 12.15% of 450 =
  13. 13.50% of 900 =
  14. 14.10% of 890 =
  15. 15.50% of 400 =
  16. 16.15% of 180 =
  17. 17.5% of 400 =
  18. 18.5% of 190 =
  19. 19.10% of 440 =
  20. 20.50% of 250 =
  21. 21.1% of 900 =
  22. 22.1% of 210 =
  23. 23.15% of 770 =
  24. 24.10% of 470 =
  25. 25.15% of 520 =
  26. 26.50% of 200 =
  27. 27.15% of 400 =
  28. 28.25% of 120 =
  29. 29.10% of 720 =
  30. 30.5% of 490 =
  31. 31.20% of 860 =
  32. 32.15% of 750 =
  33. 33.5% of 510 =
  34. 34.10% of 800 =
  35. 35.15% of 760 =
  36. 36.1% of 210 =
  37. 37.10% of 260 =
  38. 38.5% of 80 =
  39. 39.5% of 280 =
  40. 40.15% of 140 =

Answer key

  1. 37
  2. 10
  3. 2
  4. 3.3
  5. 210
  6. 50
  7. 105
  8. 108
  9. 14.5
  10. 195
  11. 385
  12. 67.5
  13. 450
  14. 89
  15. 200
  16. 27
  17. 20
  18. 9.5
  19. 44
  20. 125
  21. 9
  22. 2.1
  23. 115.5
  24. 47
  25. 78
  26. 100
  27. 60
  28. 30
  29. 72
  30. 24.5
  31. 172
  32. 112.5
  33. 25.5
  34. 80
  35. 114
  36. 2.1
  37. 26
  38. 4
  39. 14
  40. 21

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