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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 679 · 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 320 =
  2. 2.10% of 250 =
  3. 3.10% of 800 =
  4. 4.1% of 20 =
  5. 5.10% of 740 =
  6. 6.5% of 400 =
  7. 7.10% of 180 =
  8. 8.15% of 270 =
  9. 9.10% of 630 =
  10. 10.15% of 880 =
  11. 11.5% of 310 =
  12. 12.50% of 160 =
  13. 13.50% of 70 =
  14. 14.50% of 850 =
  15. 15.15% of 580 =
  16. 16.10% of 110 =
  17. 17.10% of 550 =
  18. 18.1% of 300 =
  19. 19.15% of 800 =
  20. 20.50% of 400 =
  21. 21.10% of 800 =
  22. 22.1% of 750 =
  23. 23.50% of 450 =
  24. 24.1% of 890 =
  25. 25.15% of 600 =
  26. 26.5% of 430 =
  27. 27.20% of 500 =
  28. 28.50% of 720 =
  29. 29.10% of 260 =
  30. 30.20% of 290 =
  31. 31.1% of 300 =
  32. 32.1% of 210 =
  33. 33.10% of 760 =
  34. 34.1% of 40 =
  35. 35.5% of 340 =
  36. 36.15% of 400 =
  37. 37.50% of 540 =
  38. 38.20% of 800 =
  39. 39.15% of 300 =
  40. 40.15% of 780 =

Answer key

  1. 32
  2. 25
  3. 80
  4. 0.2
  5. 74
  6. 20
  7. 18
  8. 40.5
  9. 63
  10. 132
  11. 15.5
  12. 80
  13. 35
  14. 425
  15. 87
  16. 11
  17. 55
  18. 3
  19. 120
  20. 200
  21. 80
  22. 7.5
  23. 225
  24. 8.9
  25. 90
  26. 21.5
  27. 100
  28. 360
  29. 26
  30. 58
  31. 3
  32. 2.1
  33. 76
  34. 0.4
  35. 17
  36. 60
  37. 270
  38. 160
  39. 45
  40. 117

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