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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 123 · 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. 1.50% of 710 =
  2. 2.15% of 440 =
  3. 3.50% of 770 =
  4. 4.20% of 240 =
  5. 5.50% of 460 =
  6. 6.10% of 840 =
  7. 7.20% of 210 =
  8. 8.5% of 170 =
  9. 9.1% of 230 =
  10. 10.5% of 330 =
  11. 11.25% of 310 =
  12. 12.50% of 310 =
  13. 13.25% of 770 =
  14. 14.25% of 840 =
  15. 15.1% of 680 =
  16. 16.5% of 810 =
  17. 17.15% of 210 =
  18. 18.20% of 900 =
  19. 19.20% of 110 =
  20. 20.15% of 560 =
  21. 21.20% of 800 =
  22. 22.15% of 860 =
  23. 23.10% of 130 =
  24. 24.25% of 640 =
  25. 25.1% of 580 =
  26. 26.10% of 20 =
  27. 27.15% of 690 =
  28. 28.5% of 500 =
  29. 29.15% of 790 =
  30. 30.5% of 540 =
  31. 31.15% of 480 =
  32. 32.5% of 390 =
  33. 33.10% of 510 =
  34. 34.10% of 500 =
  35. 35.10% of 80 =
  36. 36.15% of 60 =
  37. 37.10% of 190 =
  38. 38.5% of 50 =
  39. 39.10% of 600 =
  40. 40.50% of 300 =

Answer key

  1. 355
  2. 66
  3. 385
  4. 48
  5. 230
  6. 84
  7. 42
  8. 8.5
  9. 2.3
  10. 16.5
  11. 77.5
  12. 155
  13. 192.5
  14. 210
  15. 6.8
  16. 40.5
  17. 31.5
  18. 180
  19. 22
  20. 84
  21. 160
  22. 129
  23. 13
  24. 160
  25. 5.8
  26. 2
  27. 103.5
  28. 25
  29. 118.5
  30. 27
  31. 72
  32. 19.5
  33. 51
  34. 50
  35. 8
  36. 9
  37. 19
  38. 2.5
  39. 60
  40. 150

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