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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 652 · 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 480 =
  2. 2.50% of 210 =
  3. 3.50% of 850 =
  4. 4.5% of 570 =
  5. 5.1% of 640 =
  6. 6.10% of 560 =
  7. 7.10% of 740 =
  8. 8.5% of 460 =
  9. 9.50% of 300 =
  10. 10.1% of 250 =
  11. 11.25% of 50 =
  12. 12.10% of 100 =
  13. 13.10% of 670 =
  14. 14.25% of 590 =
  15. 15.5% of 850 =
  16. 16.20% of 240 =
  17. 17.50% of 900 =
  18. 18.50% of 520 =
  19. 19.20% of 30 =
  20. 20.50% of 60 =
  21. 21.15% of 790 =
  22. 22.50% of 570 =
  23. 23.5% of 770 =
  24. 24.10% of 850 =
  25. 25.15% of 410 =
  26. 26.1% of 70 =
  27. 27.50% of 740 =
  28. 28.10% of 820 =
  29. 29.5% of 250 =
  30. 30.15% of 370 =
  31. 31.25% of 230 =
  32. 32.25% of 540 =
  33. 33.5% of 30 =
  34. 34.15% of 190 =
  35. 35.15% of 130 =
  36. 36.10% of 400 =
  37. 37.5% of 440 =
  38. 38.50% of 550 =
  39. 39.50% of 390 =
  40. 40.15% of 200 =

Answer key

  1. 4.8
  2. 105
  3. 425
  4. 28.5
  5. 6.4
  6. 56
  7. 74
  8. 23
  9. 150
  10. 2.5
  11. 12.5
  12. 10
  13. 67
  14. 147.5
  15. 42.5
  16. 48
  17. 450
  18. 260
  19. 6
  20. 30
  21. 118.5
  22. 285
  23. 38.5
  24. 85
  25. 61.5
  26. 0.7
  27. 370
  28. 82
  29. 12.5
  30. 55.5
  31. 57.5
  32. 135
  33. 1.5
  34. 28.5
  35. 19.5
  36. 40
  37. 22
  38. 275
  39. 195
  40. 30

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