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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 678 · 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 690 =
  2. 2.1% of 240 =
  3. 3.15% of 890 =
  4. 4.5% of 590 =
  5. 5.5% of 140 =
  6. 6.15% of 610 =
  7. 7.1% of 380 =
  8. 8.5% of 540 =
  9. 9.15% of 450 =
  10. 10.20% of 300 =
  11. 11.50% of 810 =
  12. 12.20% of 20 =
  13. 13.1% of 600 =
  14. 14.50% of 610 =
  15. 15.1% of 290 =
  16. 16.15% of 630 =
  17. 17.1% of 140 =
  18. 18.15% of 810 =
  19. 19.25% of 230 =
  20. 20.25% of 730 =
  21. 21.5% of 380 =
  22. 22.10% of 270 =
  23. 23.10% of 630 =
  24. 24.5% of 730 =
  25. 25.50% of 900 =
  26. 26.5% of 800 =
  27. 27.20% of 120 =
  28. 28.10% of 80 =
  29. 29.1% of 340 =
  30. 30.1% of 180 =
  31. 31.1% of 370 =
  32. 32.10% of 330 =
  33. 33.1% of 730 =
  34. 34.10% of 450 =
  35. 35.20% of 670 =
  36. 36.25% of 360 =
  37. 37.50% of 880 =
  38. 38.50% of 20 =
  39. 39.25% of 560 =
  40. 40.5% of 230 =

Answer key

  1. 69
  2. 2.4
  3. 133.5
  4. 29.5
  5. 7
  6. 91.5
  7. 3.8
  8. 27
  9. 67.5
  10. 60
  11. 405
  12. 4
  13. 6
  14. 305
  15. 2.9
  16. 94.5
  17. 1.4
  18. 121.5
  19. 57.5
  20. 182.5
  21. 19
  22. 27
  23. 63
  24. 36.5
  25. 450
  26. 40
  27. 24
  28. 8
  29. 3.4
  30. 1.8
  31. 3.7
  32. 33
  33. 7.3
  34. 45
  35. 134
  36. 90
  37. 440
  38. 10
  39. 140
  40. 11.5

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