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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 497 · 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 610 =
  2. 2.20% of 230 =
  3. 3.10% of 330 =
  4. 4.20% of 560 =
  5. 5.50% of 180 =
  6. 6.5% of 820 =
  7. 7.1% of 110 =
  8. 8.5% of 520 =
  9. 9.1% of 680 =
  10. 10.10% of 260 =
  11. 11.50% of 50 =
  12. 12.50% of 820 =
  13. 13.15% of 840 =
  14. 14.25% of 140 =
  15. 15.1% of 560 =
  16. 16.10% of 350 =
  17. 17.10% of 270 =
  18. 18.50% of 710 =
  19. 19.10% of 190 =
  20. 20.15% of 510 =
  21. 21.10% of 750 =
  22. 22.15% of 240 =
  23. 23.5% of 590 =
  24. 24.25% of 270 =
  25. 25.5% of 760 =
  26. 26.25% of 790 =
  27. 27.20% of 350 =
  28. 28.50% of 750 =
  29. 29.20% of 600 =
  30. 30.25% of 290 =
  31. 31.1% of 260 =
  32. 32.20% of 680 =
  33. 33.5% of 450 =
  34. 34.5% of 500 =
  35. 35.5% of 780 =
  36. 36.5% of 520 =
  37. 37.5% of 800 =
  38. 38.25% of 130 =
  39. 39.10% of 240 =
  40. 40.50% of 230 =

Answer key

  1. 6.1
  2. 46
  3. 33
  4. 112
  5. 90
  6. 41
  7. 1.1
  8. 26
  9. 6.8
  10. 26
  11. 25
  12. 410
  13. 126
  14. 35
  15. 5.6
  16. 35
  17. 27
  18. 355
  19. 19
  20. 76.5
  21. 75
  22. 36
  23. 29.5
  24. 67.5
  25. 38
  26. 197.5
  27. 70
  28. 375
  29. 120
  30. 72.5
  31. 2.6
  32. 136
  33. 22.5
  34. 25
  35. 39
  36. 26
  37. 40
  38. 32.5
  39. 24
  40. 115

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