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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 395 · 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. 1.10% of 400 =
  2. 2.5% of 340 =
  3. 3.5% of 200 =
  4. 4.10% of 590 =
  5. 5.10% of 40 =
  6. 6.10% of 40 =
  7. 7.50% of 900 =
  8. 8.50% of 740 =
  9. 9.1% of 70 =
  10. 10.5% of 690 =
  11. 11.20% of 280 =
  12. 12.20% of 70 =
  13. 13.15% of 680 =
  14. 14.10% of 340 =
  15. 15.1% of 410 =
  16. 16.15% of 460 =
  17. 17.50% of 140 =
  18. 18.20% of 770 =
  19. 19.15% of 890 =
  20. 20.15% of 270 =
  21. 21.20% of 120 =
  22. 22.1% of 250 =
  23. 23.15% of 90 =
  24. 24.20% of 620 =
  25. 25.15% of 720 =
  26. 26.15% of 100 =
  27. 27.10% of 350 =
  28. 28.5% of 300 =
  29. 29.50% of 370 =
  30. 30.10% of 710 =
  31. 31.5% of 260 =
  32. 32.20% of 880 =
  33. 33.10% of 580 =
  34. 34.20% of 630 =
  35. 35.20% of 50 =
  36. 36.15% of 120 =
  37. 37.25% of 90 =
  38. 38.20% of 80 =
  39. 39.10% of 460 =
  40. 40.15% of 30 =

Answer key

  1. 40
  2. 17
  3. 10
  4. 59
  5. 4
  6. 4
  7. 450
  8. 370
  9. 0.7
  10. 34.5
  11. 56
  12. 14
  13. 102
  14. 34
  15. 4.1
  16. 69
  17. 70
  18. 154
  19. 133.5
  20. 40.5
  21. 24
  22. 2.5
  23. 13.5
  24. 124
  25. 108
  26. 15
  27. 35
  28. 15
  29. 185
  30. 71
  31. 13
  32. 176
  33. 58
  34. 126
  35. 10
  36. 18
  37. 22.5
  38. 16
  39. 46
  40. 4.5

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