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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 985 · 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. 1.15% of 230 =
  2. 2.25% of 210 =
  3. 3.20% of 720 =
  4. 4.5% of 340 =
  5. 5.1% of 140 =
  6. 6.5% of 790 =
  7. 7.25% of 650 =
  8. 8.25% of 890 =
  9. 9.20% of 100 =
  10. 10.1% of 900 =
  11. 11.50% of 380 =
  12. 12.15% of 500 =
  13. 13.1% of 210 =
  14. 14.1% of 350 =
  15. 15.25% of 810 =
  16. 16.20% of 410 =
  17. 17.10% of 250 =
  18. 18.25% of 400 =
  19. 19.25% of 130 =
  20. 20.20% of 750 =
  21. 21.10% of 420 =
  22. 22.15% of 160 =
  23. 23.50% of 570 =
  24. 24.50% of 340 =
  25. 25.5% of 380 =
  26. 26.50% of 540 =
  27. 27.25% of 140 =
  28. 28.15% of 730 =
  29. 29.20% of 70 =
  30. 30.50% of 740 =
  31. 31.5% of 70 =
  32. 32.10% of 810 =
  33. 33.20% of 840 =
  34. 34.20% of 280 =
  35. 35.10% of 340 =
  36. 36.10% of 790 =
  37. 37.25% of 250 =
  38. 38.25% of 570 =
  39. 39.50% of 420 =
  40. 40.5% of 880 =

Answer key

  1. 34.5
  2. 52.5
  3. 144
  4. 17
  5. 1.4
  6. 39.5
  7. 162.5
  8. 222.5
  9. 20
  10. 9
  11. 190
  12. 75
  13. 2.1
  14. 3.5
  15. 202.5
  16. 82
  17. 25
  18. 100
  19. 32.5
  20. 150
  21. 42
  22. 24
  23. 285
  24. 170
  25. 19
  26. 270
  27. 35
  28. 109.5
  29. 14
  30. 370
  31. 3.5
  32. 81
  33. 168
  34. 56
  35. 34
  36. 79
  37. 62.5
  38. 142.5
  39. 210
  40. 44

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