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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 491 · 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. 1.20% of 510 =
  2. 2.1% of 590 =
  3. 3.15% of 720 =
  4. 4.5% of 290 =
  5. 5.10% of 140 =
  6. 6.15% of 450 =
  7. 7.20% of 70 =
  8. 8.25% of 60 =
  9. 9.5% of 260 =
  10. 10.5% of 200 =
  11. 11.5% of 620 =
  12. 12.10% of 80 =
  13. 13.10% of 460 =
  14. 14.10% of 340 =
  15. 15.1% of 860 =
  16. 16.10% of 370 =
  17. 17.1% of 890 =
  18. 18.15% of 540 =
  19. 19.5% of 550 =
  20. 20.1% of 390 =
  21. 21.5% of 340 =
  22. 22.15% of 70 =
  23. 23.10% of 130 =
  24. 24.1% of 390 =
  25. 25.10% of 300 =
  26. 26.15% of 250 =
  27. 27.5% of 790 =
  28. 28.15% of 90 =
  29. 29.5% of 400 =
  30. 30.15% of 130 =
  31. 31.25% of 20 =
  32. 32.50% of 410 =
  33. 33.5% of 30 =
  34. 34.1% of 260 =
  35. 35.1% of 480 =
  36. 36.10% of 880 =
  37. 37.25% of 540 =
  38. 38.50% of 760 =
  39. 39.50% of 700 =
  40. 40.10% of 430 =

Answer key

  1. 102
  2. 5.9
  3. 108
  4. 14.5
  5. 14
  6. 67.5
  7. 14
  8. 15
  9. 13
  10. 10
  11. 31
  12. 8
  13. 46
  14. 34
  15. 8.6
  16. 37
  17. 8.9
  18. 81
  19. 27.5
  20. 3.9
  21. 17
  22. 10.5
  23. 13
  24. 3.9
  25. 30
  26. 37.5
  27. 39.5
  28. 13.5
  29. 20
  30. 19.5
  31. 5
  32. 205
  33. 1.5
  34. 2.6
  35. 4.8
  36. 88
  37. 135
  38. 380
  39. 350
  40. 43

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