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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 126 · 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. 1.25% of 80 =
  2. 2.50% of 360 =
  3. 3.10% of 800 =
  4. 4.20% of 160 =
  5. 5.5% of 350 =
  6. 6.1% of 90 =
  7. 7.15% of 40 =
  8. 8.15% of 230 =
  9. 9.10% of 360 =
  10. 10.5% of 80 =
  11. 11.10% of 700 =
  12. 12.1% of 570 =
  13. 13.1% of 890 =
  14. 14.10% of 160 =
  15. 15.15% of 120 =
  16. 16.10% of 90 =
  17. 17.1% of 490 =
  18. 18.50% of 240 =
  19. 19.50% of 810 =
  20. 20.10% of 90 =
  21. 21.15% of 50 =
  22. 22.15% of 590 =
  23. 23.20% of 500 =
  24. 24.25% of 800 =
  25. 25.5% of 610 =
  26. 26.10% of 710 =
  27. 27.5% of 30 =
  28. 28.10% of 750 =
  29. 29.25% of 560 =
  30. 30.20% of 180 =
  31. 31.5% of 270 =
  32. 32.1% of 300 =
  33. 33.25% of 380 =
  34. 34.5% of 490 =
  35. 35.20% of 800 =
  36. 36.20% of 490 =
  37. 37.5% of 270 =
  38. 38.1% of 110 =
  39. 39.5% of 80 =
  40. 40.10% of 600 =

Answer key

  1. 20
  2. 180
  3. 80
  4. 32
  5. 17.5
  6. 0.9
  7. 6
  8. 34.5
  9. 36
  10. 4
  11. 70
  12. 5.7
  13. 8.9
  14. 16
  15. 18
  16. 9
  17. 4.9
  18. 120
  19. 405
  20. 9
  21. 7.5
  22. 88.5
  23. 100
  24. 200
  25. 30.5
  26. 71
  27. 1.5
  28. 75
  29. 140
  30. 36
  31. 13.5
  32. 3
  33. 95
  34. 24.5
  35. 160
  36. 98
  37. 13.5
  38. 1.1
  39. 4
  40. 60

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