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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 193 · 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 550 =
  2. 2.1% of 260 =
  3. 3.50% of 570 =
  4. 4.10% of 230 =
  5. 5.1% of 480 =
  6. 6.25% of 210 =
  7. 7.10% of 600 =
  8. 8.20% of 380 =
  9. 9.5% of 500 =
  10. 10.20% of 120 =
  11. 11.15% of 310 =
  12. 12.50% of 180 =
  13. 13.50% of 60 =
  14. 14.25% of 270 =
  15. 15.5% of 290 =
  16. 16.20% of 730 =
  17. 17.20% of 520 =
  18. 18.10% of 150 =
  19. 19.5% of 770 =
  20. 20.10% of 300 =
  21. 21.10% of 750 =
  22. 22.20% of 70 =
  23. 23.1% of 400 =
  24. 24.50% of 520 =
  25. 25.5% of 870 =
  26. 26.5% of 510 =
  27. 27.15% of 140 =
  28. 28.1% of 290 =
  29. 29.15% of 50 =
  30. 30.5% of 290 =
  31. 31.5% of 770 =
  32. 32.50% of 520 =
  33. 33.15% of 360 =
  34. 34.50% of 180 =
  35. 35.5% of 160 =
  36. 36.50% of 780 =
  37. 37.50% of 430 =
  38. 38.10% of 100 =
  39. 39.1% of 220 =
  40. 40.1% of 320 =

Answer key

  1. 27.5
  2. 2.6
  3. 285
  4. 23
  5. 4.8
  6. 52.5
  7. 60
  8. 76
  9. 25
  10. 24
  11. 46.5
  12. 90
  13. 30
  14. 67.5
  15. 14.5
  16. 146
  17. 104
  18. 15
  19. 38.5
  20. 30
  21. 75
  22. 14
  23. 4
  24. 260
  25. 43.5
  26. 25.5
  27. 21
  28. 2.9
  29. 7.5
  30. 14.5
  31. 38.5
  32. 260
  33. 54
  34. 90
  35. 8
  36. 390
  37. 215
  38. 10
  39. 2.2
  40. 3.2

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