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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 180 · 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 300 =
  2. 2.1% of 120 =
  3. 3.1% of 170 =
  4. 4.15% of 250 =
  5. 5.1% of 50 =
  6. 6.15% of 70 =
  7. 7.50% of 120 =
  8. 8.50% of 890 =
  9. 9.1% of 730 =
  10. 10.1% of 540 =
  11. 11.15% of 420 =
  12. 12.15% of 740 =
  13. 13.25% of 750 =
  14. 14.15% of 20 =
  15. 15.10% of 530 =
  16. 16.20% of 830 =
  17. 17.20% of 420 =
  18. 18.10% of 170 =
  19. 19.25% of 480 =
  20. 20.10% of 110 =
  21. 21.50% of 670 =
  22. 22.10% of 280 =
  23. 23.5% of 20 =
  24. 24.20% of 280 =
  25. 25.1% of 850 =
  26. 26.50% of 40 =
  27. 27.5% of 30 =
  28. 28.50% of 230 =
  29. 29.20% of 870 =
  30. 30.10% of 100 =
  31. 31.10% of 770 =
  32. 32.5% of 600 =
  33. 33.15% of 260 =
  34. 34.10% of 510 =
  35. 35.25% of 180 =
  36. 36.15% of 610 =
  37. 37.50% of 60 =
  38. 38.20% of 530 =
  39. 39.5% of 380 =
  40. 40.20% of 760 =

Answer key

  1. 3
  2. 1.2
  3. 1.7
  4. 37.5
  5. 0.5
  6. 10.5
  7. 60
  8. 445
  9. 7.3
  10. 5.4
  11. 63
  12. 111
  13. 187.5
  14. 3
  15. 53
  16. 166
  17. 84
  18. 17
  19. 120
  20. 11
  21. 335
  22. 28
  23. 1
  24. 56
  25. 8.5
  26. 20
  27. 1.5
  28. 115
  29. 174
  30. 10
  31. 77
  32. 30
  33. 39
  34. 51
  35. 45
  36. 91.5
  37. 30
  38. 106
  39. 19
  40. 152

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