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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 382 · 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. 1.5% of 220 =
  2. 2.15% of 840 =
  3. 3.25% of 690 =
  4. 4.20% of 60 =
  5. 5.15% of 850 =
  6. 6.10% of 830 =
  7. 7.10% of 560 =
  8. 8.15% of 200 =
  9. 9.20% of 800 =
  10. 10.15% of 490 =
  11. 11.1% of 340 =
  12. 12.20% of 480 =
  13. 13.1% of 80 =
  14. 14.20% of 310 =
  15. 15.15% of 130 =
  16. 16.5% of 480 =
  17. 17.50% of 180 =
  18. 18.1% of 170 =
  19. 19.10% of 390 =
  20. 20.20% of 300 =
  21. 21.25% of 780 =
  22. 22.15% of 890 =
  23. 23.15% of 170 =
  24. 24.50% of 590 =
  25. 25.25% of 860 =
  26. 26.25% of 180 =
  27. 27.50% of 870 =
  28. 28.5% of 600 =
  29. 29.1% of 220 =
  30. 30.50% of 560 =
  31. 31.25% of 600 =
  32. 32.20% of 220 =
  33. 33.15% of 600 =
  34. 34.25% of 560 =
  35. 35.15% of 740 =
  36. 36.20% of 780 =
  37. 37.1% of 600 =
  38. 38.25% of 870 =
  39. 39.20% of 340 =
  40. 40.10% of 590 =

Answer key

  1. 11
  2. 126
  3. 172.5
  4. 12
  5. 127.5
  6. 83
  7. 56
  8. 30
  9. 160
  10. 73.5
  11. 3.4
  12. 96
  13. 0.8
  14. 62
  15. 19.5
  16. 24
  17. 90
  18. 1.7
  19. 39
  20. 60
  21. 195
  22. 133.5
  23. 25.5
  24. 295
  25. 215
  26. 45
  27. 435
  28. 30
  29. 2.2
  30. 280
  31. 150
  32. 44
  33. 90
  34. 140
  35. 111
  36. 156
  37. 6
  38. 217.5
  39. 68
  40. 59

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