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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 100 · 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. 1.20% of 900 =
  2. 2.50% of 490 =
  3. 3.15% of 490 =
  4. 4.10% of 550 =
  5. 5.20% of 230 =
  6. 6.5% of 900 =
  7. 7.10% of 270 =
  8. 8.5% of 340 =
  9. 9.20% of 510 =
  10. 10.25% of 30 =
  11. 11.20% of 40 =
  12. 12.50% of 170 =
  13. 13.5% of 890 =
  14. 14.15% of 230 =
  15. 15.5% of 200 =
  16. 16.15% of 230 =
  17. 17.5% of 20 =
  18. 18.1% of 700 =
  19. 19.5% of 360 =
  20. 20.10% of 650 =
  21. 21.50% of 250 =
  22. 22.20% of 570 =
  23. 23.25% of 110 =
  24. 24.1% of 450 =
  25. 25.5% of 320 =
  26. 26.20% of 50 =
  27. 27.5% of 450 =
  28. 28.25% of 670 =
  29. 29.15% of 60 =
  30. 30.5% of 650 =
  31. 31.20% of 170 =
  32. 32.5% of 900 =
  33. 33.5% of 250 =
  34. 34.1% of 460 =
  35. 35.5% of 100 =
  36. 36.20% of 140 =
  37. 37.50% of 440 =
  38. 38.25% of 590 =
  39. 39.1% of 710 =
  40. 40.10% of 230 =

Answer key

  1. 180
  2. 245
  3. 73.5
  4. 55
  5. 46
  6. 45
  7. 27
  8. 17
  9. 102
  10. 7.5
  11. 8
  12. 85
  13. 44.5
  14. 34.5
  15. 10
  16. 34.5
  17. 1
  18. 7
  19. 18
  20. 65
  21. 125
  22. 114
  23. 27.5
  24. 4.5
  25. 16
  26. 10
  27. 22.5
  28. 167.5
  29. 9
  30. 32.5
  31. 34
  32. 45
  33. 12.5
  34. 4.6
  35. 5
  36. 28
  37. 220
  38. 147.5
  39. 7.1
  40. 23

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