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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 783 · 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 120 =
  2. 2.5% of 330 =
  3. 3.15% of 140 =
  4. 4.10% of 300 =
  5. 5.25% of 540 =
  6. 6.10% of 700 =
  7. 7.20% of 150 =
  8. 8.20% of 420 =
  9. 9.25% of 840 =
  10. 10.15% of 820 =
  11. 11.5% of 720 =
  12. 12.50% of 350 =
  13. 13.20% of 820 =
  14. 14.1% of 880 =
  15. 15.10% of 420 =
  16. 16.20% of 130 =
  17. 17.20% of 370 =
  18. 18.1% of 370 =
  19. 19.5% of 90 =
  20. 20.5% of 700 =
  21. 21.5% of 130 =
  22. 22.15% of 500 =
  23. 23.50% of 850 =
  24. 24.1% of 130 =
  25. 25.1% of 150 =
  26. 26.50% of 480 =
  27. 27.15% of 690 =
  28. 28.10% of 470 =
  29. 29.10% of 290 =
  30. 30.1% of 120 =
  31. 31.25% of 720 =
  32. 32.50% of 240 =
  33. 33.10% of 570 =
  34. 34.15% of 200 =
  35. 35.25% of 550 =
  36. 36.10% of 840 =
  37. 37.5% of 410 =
  38. 38.20% of 460 =
  39. 39.25% of 420 =
  40. 40.50% of 280 =

Answer key

  1. 24
  2. 16.5
  3. 21
  4. 30
  5. 135
  6. 70
  7. 30
  8. 84
  9. 210
  10. 123
  11. 36
  12. 175
  13. 164
  14. 8.8
  15. 42
  16. 26
  17. 74
  18. 3.7
  19. 4.5
  20. 35
  21. 6.5
  22. 75
  23. 425
  24. 1.3
  25. 1.5
  26. 240
  27. 103.5
  28. 47
  29. 29
  30. 1.2
  31. 180
  32. 120
  33. 57
  34. 30
  35. 137.5
  36. 84
  37. 20.5
  38. 92
  39. 105
  40. 140

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