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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 14 · 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 340 =
  2. 2.5% of 830 =
  3. 3.15% of 180 =
  4. 4.50% of 520 =
  5. 5.15% of 890 =
  6. 6.50% of 120 =
  7. 7.1% of 650 =
  8. 8.10% of 260 =
  9. 9.50% of 410 =
  10. 10.10% of 190 =
  11. 11.15% of 320 =
  12. 12.20% of 390 =
  13. 13.20% of 60 =
  14. 14.5% of 120 =
  15. 15.50% of 60 =
  16. 16.20% of 440 =
  17. 17.15% of 660 =
  18. 18.20% of 90 =
  19. 19.10% of 420 =
  20. 20.1% of 240 =
  21. 21.20% of 440 =
  22. 22.1% of 100 =
  23. 23.10% of 140 =
  24. 24.20% of 540 =
  25. 25.50% of 460 =
  26. 26.5% of 540 =
  27. 27.15% of 360 =
  28. 28.10% of 300 =
  29. 29.10% of 670 =
  30. 30.25% of 60 =
  31. 31.15% of 470 =
  32. 32.50% of 110 =
  33. 33.15% of 350 =
  34. 34.25% of 90 =
  35. 35.25% of 460 =
  36. 36.20% of 520 =
  37. 37.50% of 140 =
  38. 38.5% of 160 =
  39. 39.1% of 630 =
  40. 40.20% of 530 =

Answer key

  1. 68
  2. 41.5
  3. 27
  4. 260
  5. 133.5
  6. 60
  7. 6.5
  8. 26
  9. 205
  10. 19
  11. 48
  12. 78
  13. 12
  14. 6
  15. 30
  16. 88
  17. 99
  18. 18
  19. 42
  20. 2.4
  21. 88
  22. 1
  23. 14
  24. 108
  25. 230
  26. 27
  27. 54
  28. 30
  29. 67
  30. 15
  31. 70.5
  32. 55
  33. 52.5
  34. 22.5
  35. 115
  36. 104
  37. 70
  38. 8
  39. 6.3
  40. 106

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