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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 340 · 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 620 =
  2. 2.10% of 360 =
  3. 3.25% of 880 =
  4. 4.10% of 70 =
  5. 5.5% of 270 =
  6. 6.5% of 70 =
  7. 7.5% of 110 =
  8. 8.5% of 650 =
  9. 9.15% of 270 =
  10. 10.10% of 50 =
  11. 11.25% of 180 =
  12. 12.15% of 790 =
  13. 13.15% of 660 =
  14. 14.20% of 460 =
  15. 15.5% of 840 =
  16. 16.20% of 90 =
  17. 17.1% of 70 =
  18. 18.5% of 370 =
  19. 19.15% of 350 =
  20. 20.20% of 720 =
  21. 21.20% of 380 =
  22. 22.10% of 370 =
  23. 23.20% of 610 =
  24. 24.1% of 380 =
  25. 25.25% of 230 =
  26. 26.5% of 830 =
  27. 27.50% of 530 =
  28. 28.1% of 390 =
  29. 29.15% of 170 =
  30. 30.10% of 80 =
  31. 31.10% of 580 =
  32. 32.10% of 530 =
  33. 33.15% of 590 =
  34. 34.25% of 20 =
  35. 35.1% of 50 =
  36. 36.25% of 390 =
  37. 37.50% of 440 =
  38. 38.25% of 110 =
  39. 39.50% of 760 =
  40. 40.5% of 460 =

Answer key

  1. 6.2
  2. 36
  3. 220
  4. 7
  5. 13.5
  6. 3.5
  7. 5.5
  8. 32.5
  9. 40.5
  10. 5
  11. 45
  12. 118.5
  13. 99
  14. 92
  15. 42
  16. 18
  17. 0.7
  18. 18.5
  19. 52.5
  20. 144
  21. 76
  22. 37
  23. 122
  24. 3.8
  25. 57.5
  26. 41.5
  27. 265
  28. 3.9
  29. 25.5
  30. 8
  31. 58
  32. 53
  33. 88.5
  34. 5
  35. 0.5
  36. 97.5
  37. 220
  38. 27.5
  39. 380
  40. 23

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