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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 380 · 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 860 =
  2. 2.5% of 470 =
  3. 3.20% of 110 =
  4. 4.10% of 710 =
  5. 5.20% of 210 =
  6. 6.10% of 400 =
  7. 7.20% of 540 =
  8. 8.50% of 690 =
  9. 9.10% of 250 =
  10. 10.1% of 660 =
  11. 11.10% of 700 =
  12. 12.20% of 350 =
  13. 13.50% of 890 =
  14. 14.15% of 310 =
  15. 15.20% of 680 =
  16. 16.15% of 510 =
  17. 17.10% of 820 =
  18. 18.15% of 670 =
  19. 19.10% of 490 =
  20. 20.10% of 580 =
  21. 21.15% of 410 =
  22. 22.50% of 330 =
  23. 23.15% of 460 =
  24. 24.15% of 640 =
  25. 25.50% of 690 =
  26. 26.10% of 850 =
  27. 27.10% of 700 =
  28. 28.15% of 840 =
  29. 29.5% of 430 =
  30. 30.1% of 740 =
  31. 31.20% of 20 =
  32. 32.20% of 100 =
  33. 33.5% of 390 =
  34. 34.10% of 610 =
  35. 35.50% of 60 =
  36. 36.15% of 590 =
  37. 37.20% of 740 =
  38. 38.1% of 420 =
  39. 39.25% of 640 =
  40. 40.5% of 150 =

Answer key

  1. 8.6
  2. 23.5
  3. 22
  4. 71
  5. 42
  6. 40
  7. 108
  8. 345
  9. 25
  10. 6.6
  11. 70
  12. 70
  13. 445
  14. 46.5
  15. 136
  16. 76.5
  17. 82
  18. 100.5
  19. 49
  20. 58
  21. 61.5
  22. 165
  23. 69
  24. 96
  25. 345
  26. 85
  27. 70
  28. 126
  29. 21.5
  30. 7.4
  31. 4
  32. 20
  33. 19.5
  34. 61
  35. 30
  36. 88.5
  37. 148
  38. 4.2
  39. 160
  40. 7.5

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