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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 72 · 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. 1.1% of 680 =
  2. 2.50% of 300 =
  3. 3.1% of 430 =
  4. 4.15% of 830 =
  5. 5.1% of 670 =
  6. 6.10% of 570 =
  7. 7.20% of 570 =
  8. 8.5% of 760 =
  9. 9.20% of 340 =
  10. 10.25% of 250 =
  11. 11.10% of 490 =
  12. 12.1% of 690 =
  13. 13.20% of 520 =
  14. 14.10% of 440 =
  15. 15.20% of 110 =
  16. 16.1% of 450 =
  17. 17.1% of 290 =
  18. 18.1% of 270 =
  19. 19.5% of 190 =
  20. 20.15% of 700 =
  21. 21.25% of 190 =
  22. 22.10% of 180 =
  23. 23.10% of 430 =
  24. 24.5% of 420 =
  25. 25.10% of 670 =
  26. 26.25% of 430 =
  27. 27.10% of 290 =
  28. 28.15% of 850 =
  29. 29.25% of 310 =
  30. 30.1% of 610 =
  31. 31.1% of 890 =
  32. 32.50% of 380 =
  33. 33.20% of 60 =
  34. 34.50% of 770 =
  35. 35.20% of 190 =
  36. 36.5% of 240 =
  37. 37.1% of 470 =
  38. 38.15% of 230 =
  39. 39.15% of 800 =
  40. 40.1% of 700 =

Answer key

  1. 6.8
  2. 150
  3. 4.3
  4. 124.5
  5. 6.7
  6. 57
  7. 114
  8. 38
  9. 68
  10. 62.5
  11. 49
  12. 6.9
  13. 104
  14. 44
  15. 22
  16. 4.5
  17. 2.9
  18. 2.7
  19. 9.5
  20. 105
  21. 47.5
  22. 18
  23. 43
  24. 21
  25. 67
  26. 107.5
  27. 29
  28. 127.5
  29. 77.5
  30. 6.1
  31. 8.9
  32. 190
  33. 12
  34. 385
  35. 38
  36. 12
  37. 4.7
  38. 34.5
  39. 120
  40. 7

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