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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 214 · 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 510 =
  2. 2.25% of 650 =
  3. 3.20% of 440 =
  4. 4.5% of 290 =
  5. 5.20% of 100 =
  6. 6.50% of 270 =
  7. 7.5% of 770 =
  8. 8.5% of 640 =
  9. 9.5% of 560 =
  10. 10.25% of 40 =
  11. 11.15% of 190 =
  12. 12.10% of 250 =
  13. 13.10% of 30 =
  14. 14.50% of 170 =
  15. 15.20% of 820 =
  16. 16.1% of 780 =
  17. 17.5% of 570 =
  18. 18.10% of 100 =
  19. 19.25% of 590 =
  20. 20.50% of 800 =
  21. 21.1% of 40 =
  22. 22.5% of 40 =
  23. 23.5% of 100 =
  24. 24.15% of 190 =
  25. 25.50% of 850 =
  26. 26.15% of 280 =
  27. 27.1% of 90 =
  28. 28.5% of 900 =
  29. 29.1% of 700 =
  30. 30.1% of 170 =
  31. 31.25% of 180 =
  32. 32.5% of 210 =
  33. 33.20% of 840 =
  34. 34.5% of 60 =
  35. 35.20% of 820 =
  36. 36.5% of 220 =
  37. 37.10% of 750 =
  38. 38.15% of 140 =
  39. 39.10% of 510 =
  40. 40.10% of 650 =

Answer key

  1. 5.1
  2. 162.5
  3. 88
  4. 14.5
  5. 20
  6. 135
  7. 38.5
  8. 32
  9. 28
  10. 10
  11. 28.5
  12. 25
  13. 3
  14. 85
  15. 164
  16. 7.8
  17. 28.5
  18. 10
  19. 147.5
  20. 400
  21. 0.4
  22. 2
  23. 5
  24. 28.5
  25. 425
  26. 42
  27. 0.9
  28. 45
  29. 7
  30. 1.7
  31. 45
  32. 10.5
  33. 168
  34. 3
  35. 164
  36. 11
  37. 75
  38. 21
  39. 51
  40. 65

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