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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 822 · 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 840 =
  2. 2.20% of 180 =
  3. 3.25% of 260 =
  4. 4.15% of 280 =
  5. 5.20% of 640 =
  6. 6.15% of 620 =
  7. 7.25% of 120 =
  8. 8.1% of 860 =
  9. 9.10% of 20 =
  10. 10.20% of 100 =
  11. 11.15% of 600 =
  12. 12.5% of 100 =
  13. 13.15% of 750 =
  14. 14.1% of 850 =
  15. 15.20% of 620 =
  16. 16.25% of 140 =
  17. 17.5% of 220 =
  18. 18.5% of 180 =
  19. 19.20% of 480 =
  20. 20.1% of 290 =
  21. 21.50% of 130 =
  22. 22.50% of 240 =
  23. 23.1% of 420 =
  24. 24.20% of 280 =
  25. 25.1% of 600 =
  26. 26.20% of 420 =
  27. 27.15% of 550 =
  28. 28.50% of 360 =
  29. 29.25% of 100 =
  30. 30.50% of 420 =
  31. 31.20% of 260 =
  32. 32.25% of 150 =
  33. 33.25% of 470 =
  34. 34.20% of 330 =
  35. 35.25% of 90 =
  36. 36.15% of 780 =
  37. 37.25% of 210 =
  38. 38.10% of 750 =
  39. 39.50% of 210 =
  40. 40.5% of 340 =

Answer key

  1. 168
  2. 36
  3. 65
  4. 42
  5. 128
  6. 93
  7. 30
  8. 8.6
  9. 2
  10. 20
  11. 90
  12. 5
  13. 112.5
  14. 8.5
  15. 124
  16. 35
  17. 11
  18. 9
  19. 96
  20. 2.9
  21. 65
  22. 120
  23. 4.2
  24. 56
  25. 6
  26. 84
  27. 82.5
  28. 180
  29. 25
  30. 210
  31. 52
  32. 37.5
  33. 117.5
  34. 66
  35. 22.5
  36. 117
  37. 52.5
  38. 75
  39. 105
  40. 17

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