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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 692 · 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 110 =
  2. 2.5% of 890 =
  3. 3.1% of 180 =
  4. 4.10% of 890 =
  5. 5.1% of 200 =
  6. 6.20% of 640 =
  7. 7.15% of 520 =
  8. 8.50% of 120 =
  9. 9.20% of 740 =
  10. 10.50% of 170 =
  11. 11.5% of 730 =
  12. 12.5% of 350 =
  13. 13.10% of 650 =
  14. 14.25% of 100 =
  15. 15.5% of 760 =
  16. 16.20% of 670 =
  17. 17.1% of 700 =
  18. 18.20% of 90 =
  19. 19.15% of 390 =
  20. 20.15% of 150 =
  21. 21.10% of 200 =
  22. 22.1% of 340 =
  23. 23.15% of 30 =
  24. 24.10% of 530 =
  25. 25.1% of 190 =
  26. 26.50% of 140 =
  27. 27.50% of 200 =
  28. 28.1% of 300 =
  29. 29.5% of 530 =
  30. 30.15% of 310 =
  31. 31.25% of 160 =
  32. 32.15% of 690 =
  33. 33.20% of 100 =
  34. 34.20% of 620 =
  35. 35.5% of 340 =
  36. 36.5% of 360 =
  37. 37.15% of 470 =
  38. 38.20% of 80 =
  39. 39.15% of 220 =
  40. 40.15% of 200 =

Answer key

  1. 11
  2. 44.5
  3. 1.8
  4. 89
  5. 2
  6. 128
  7. 78
  8. 60
  9. 148
  10. 85
  11. 36.5
  12. 17.5
  13. 65
  14. 25
  15. 38
  16. 134
  17. 7
  18. 18
  19. 58.5
  20. 22.5
  21. 20
  22. 3.4
  23. 4.5
  24. 53
  25. 1.9
  26. 70
  27. 100
  28. 3
  29. 26.5
  30. 46.5
  31. 40
  32. 103.5
  33. 20
  34. 124
  35. 17
  36. 18
  37. 70.5
  38. 16
  39. 33
  40. 30

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