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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 805 · 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. 1.25% of 380 =
  2. 2.15% of 800 =
  3. 3.1% of 830 =
  4. 4.20% of 20 =
  5. 5.1% of 520 =
  6. 6.50% of 210 =
  7. 7.5% of 40 =
  8. 8.5% of 370 =
  9. 9.5% of 360 =
  10. 10.50% of 810 =
  11. 11.5% of 350 =
  12. 12.10% of 220 =
  13. 13.25% of 900 =
  14. 14.10% of 220 =
  15. 15.20% of 880 =
  16. 16.10% of 390 =
  17. 17.10% of 480 =
  18. 18.10% of 900 =
  19. 19.5% of 370 =
  20. 20.50% of 800 =
  21. 21.5% of 830 =
  22. 22.10% of 790 =
  23. 23.25% of 760 =
  24. 24.20% of 850 =
  25. 25.5% of 710 =
  26. 26.1% of 700 =
  27. 27.10% of 380 =
  28. 28.1% of 600 =
  29. 29.15% of 590 =
  30. 30.1% of 820 =
  31. 31.20% of 30 =
  32. 32.20% of 90 =
  33. 33.5% of 900 =
  34. 34.1% of 190 =
  35. 35.5% of 670 =
  36. 36.5% of 500 =
  37. 37.15% of 900 =
  38. 38.20% of 70 =
  39. 39.25% of 250 =
  40. 40.50% of 110 =

Answer key

  1. 95
  2. 120
  3. 8.3
  4. 4
  5. 5.2
  6. 105
  7. 2
  8. 18.5
  9. 18
  10. 405
  11. 17.5
  12. 22
  13. 225
  14. 22
  15. 176
  16. 39
  17. 48
  18. 90
  19. 18.5
  20. 400
  21. 41.5
  22. 79
  23. 190
  24. 170
  25. 35.5
  26. 7
  27. 38
  28. 6
  29. 88.5
  30. 8.2
  31. 6
  32. 18
  33. 45
  34. 1.9
  35. 33.5
  36. 25
  37. 135
  38. 14
  39. 62.5
  40. 55

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