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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 600 · 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 440 =
  2. 2.20% of 290 =
  3. 3.1% of 580 =
  4. 4.20% of 250 =
  5. 5.25% of 790 =
  6. 6.10% of 130 =
  7. 7.25% of 80 =
  8. 8.25% of 860 =
  9. 9.15% of 850 =
  10. 10.50% of 290 =
  11. 11.1% of 200 =
  12. 12.50% of 460 =
  13. 13.25% of 820 =
  14. 14.10% of 410 =
  15. 15.15% of 430 =
  16. 16.50% of 600 =
  17. 17.10% of 420 =
  18. 18.50% of 670 =
  19. 19.1% of 80 =
  20. 20.20% of 510 =
  21. 21.10% of 90 =
  22. 22.10% of 100 =
  23. 23.1% of 820 =
  24. 24.1% of 870 =
  25. 25.15% of 440 =
  26. 26.1% of 510 =
  27. 27.1% of 610 =
  28. 28.25% of 250 =
  29. 29.10% of 570 =
  30. 30.5% of 690 =
  31. 31.5% of 260 =
  32. 32.25% of 600 =
  33. 33.5% of 820 =
  34. 34.5% of 610 =
  35. 35.50% of 210 =
  36. 36.5% of 820 =
  37. 37.50% of 500 =
  38. 38.10% of 710 =
  39. 39.10% of 170 =
  40. 40.10% of 170 =

Answer key

  1. 110
  2. 58
  3. 5.8
  4. 50
  5. 197.5
  6. 13
  7. 20
  8. 215
  9. 127.5
  10. 145
  11. 2
  12. 230
  13. 205
  14. 41
  15. 64.5
  16. 300
  17. 42
  18. 335
  19. 0.8
  20. 102
  21. 9
  22. 10
  23. 8.2
  24. 8.7
  25. 66
  26. 5.1
  27. 6.1
  28. 62.5
  29. 57
  30. 34.5
  31. 13
  32. 150
  33. 41
  34. 30.5
  35. 105
  36. 41
  37. 250
  38. 71
  39. 17
  40. 17

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