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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 658 · 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 810 =
  2. 2.50% of 140 =
  3. 3.20% of 570 =
  4. 4.15% of 590 =
  5. 5.15% of 790 =
  6. 6.25% of 50 =
  7. 7.50% of 240 =
  8. 8.10% of 390 =
  9. 9.10% of 360 =
  10. 10.50% of 100 =
  11. 11.20% of 650 =
  12. 12.25% of 230 =
  13. 13.50% of 750 =
  14. 14.5% of 60 =
  15. 15.10% of 650 =
  16. 16.10% of 80 =
  17. 17.1% of 70 =
  18. 18.50% of 430 =
  19. 19.10% of 160 =
  20. 20.10% of 210 =
  21. 21.15% of 550 =
  22. 22.20% of 130 =
  23. 23.15% of 70 =
  24. 24.10% of 200 =
  25. 25.25% of 890 =
  26. 26.25% of 190 =
  27. 27.5% of 750 =
  28. 28.5% of 200 =
  29. 29.15% of 580 =
  30. 30.20% of 640 =
  31. 31.15% of 70 =
  32. 32.1% of 610 =
  33. 33.1% of 810 =
  34. 34.5% of 750 =
  35. 35.20% of 610 =
  36. 36.15% of 610 =
  37. 37.15% of 320 =
  38. 38.1% of 490 =
  39. 39.10% of 200 =
  40. 40.5% of 390 =

Answer key

  1. 81
  2. 70
  3. 114
  4. 88.5
  5. 118.5
  6. 12.5
  7. 120
  8. 39
  9. 36
  10. 50
  11. 130
  12. 57.5
  13. 375
  14. 3
  15. 65
  16. 8
  17. 0.7
  18. 215
  19. 16
  20. 21
  21. 82.5
  22. 26
  23. 10.5
  24. 20
  25. 222.5
  26. 47.5
  27. 37.5
  28. 10
  29. 87
  30. 128
  31. 10.5
  32. 6.1
  33. 8.1
  34. 37.5
  35. 122
  36. 91.5
  37. 48
  38. 4.9
  39. 20
  40. 19.5

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