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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 161 · 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. 1.5% of 750 =
  2. 2.5% of 130 =
  3. 3.25% of 310 =
  4. 4.20% of 900 =
  5. 5.10% of 160 =
  6. 6.10% of 50 =
  7. 7.5% of 420 =
  8. 8.5% of 320 =
  9. 9.50% of 500 =
  10. 10.5% of 570 =
  11. 11.50% of 50 =
  12. 12.50% of 800 =
  13. 13.10% of 900 =
  14. 14.1% of 570 =
  15. 15.10% of 100 =
  16. 16.5% of 820 =
  17. 17.25% of 330 =
  18. 18.20% of 620 =
  19. 19.5% of 350 =
  20. 20.25% of 650 =
  21. 21.10% of 600 =
  22. 22.15% of 650 =
  23. 23.15% of 830 =
  24. 24.25% of 100 =
  25. 25.50% of 420 =
  26. 26.10% of 180 =
  27. 27.5% of 520 =
  28. 28.25% of 140 =
  29. 29.25% of 260 =
  30. 30.50% of 100 =
  31. 31.25% of 500 =
  32. 32.1% of 620 =
  33. 33.10% of 450 =
  34. 34.5% of 660 =
  35. 35.50% of 360 =
  36. 36.1% of 370 =
  37. 37.20% of 260 =
  38. 38.25% of 620 =
  39. 39.1% of 870 =
  40. 40.10% of 220 =

Answer key

  1. 37.5
  2. 6.5
  3. 77.5
  4. 180
  5. 16
  6. 5
  7. 21
  8. 16
  9. 250
  10. 28.5
  11. 25
  12. 400
  13. 90
  14. 5.7
  15. 10
  16. 41
  17. 82.5
  18. 124
  19. 17.5
  20. 162.5
  21. 60
  22. 97.5
  23. 124.5
  24. 25
  25. 210
  26. 18
  27. 26
  28. 35
  29. 65
  30. 50
  31. 125
  32. 6.2
  33. 45
  34. 33
  35. 180
  36. 3.7
  37. 52
  38. 155
  39. 8.7
  40. 22

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