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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 343 · 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 30 =
  2. 2.10% of 240 =
  3. 3.5% of 70 =
  4. 4.10% of 750 =
  5. 5.20% of 860 =
  6. 6.50% of 70 =
  7. 7.5% of 810 =
  8. 8.1% of 330 =
  9. 9.15% of 710 =
  10. 10.50% of 580 =
  11. 11.15% of 390 =
  12. 12.50% of 550 =
  13. 13.25% of 250 =
  14. 14.25% of 850 =
  15. 15.20% of 620 =
  16. 16.1% of 190 =
  17. 17.5% of 810 =
  18. 18.5% of 360 =
  19. 19.5% of 720 =
  20. 20.15% of 360 =
  21. 21.25% of 780 =
  22. 22.25% of 850 =
  23. 23.1% of 390 =
  24. 24.50% of 210 =
  25. 25.5% of 60 =
  26. 26.5% of 570 =
  27. 27.15% of 650 =
  28. 28.10% of 470 =
  29. 29.5% of 390 =
  30. 30.20% of 30 =
  31. 31.20% of 760 =
  32. 32.15% of 270 =
  33. 33.5% of 540 =
  34. 34.15% of 510 =
  35. 35.1% of 890 =
  36. 36.50% of 250 =
  37. 37.5% of 830 =
  38. 38.5% of 290 =
  39. 39.25% of 280 =
  40. 40.5% of 700 =

Answer key

  1. 1.5
  2. 24
  3. 3.5
  4. 75
  5. 172
  6. 35
  7. 40.5
  8. 3.3
  9. 106.5
  10. 290
  11. 58.5
  12. 275
  13. 62.5
  14. 212.5
  15. 124
  16. 1.9
  17. 40.5
  18. 18
  19. 36
  20. 54
  21. 195
  22. 212.5
  23. 3.9
  24. 105
  25. 3
  26. 28.5
  27. 97.5
  28. 47
  29. 19.5
  30. 6
  31. 152
  32. 40.5
  33. 27
  34. 76.5
  35. 8.9
  36. 125
  37. 41.5
  38. 14.5
  39. 70
  40. 35

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