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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 700 · 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 500 =
  2. 2.10% of 680 =
  3. 3.20% of 520 =
  4. 4.25% of 510 =
  5. 5.10% of 530 =
  6. 6.15% of 270 =
  7. 7.10% of 80 =
  8. 8.25% of 740 =
  9. 9.50% of 770 =
  10. 10.50% of 770 =
  11. 11.15% of 190 =
  12. 12.15% of 900 =
  13. 13.5% of 800 =
  14. 14.25% of 310 =
  15. 15.50% of 90 =
  16. 16.15% of 270 =
  17. 17.5% of 620 =
  18. 18.5% of 110 =
  19. 19.25% of 250 =
  20. 20.20% of 880 =
  21. 21.50% of 140 =
  22. 22.1% of 750 =
  23. 23.10% of 790 =
  24. 24.5% of 650 =
  25. 25.5% of 300 =
  26. 26.25% of 50 =
  27. 27.10% of 790 =
  28. 28.5% of 810 =
  29. 29.15% of 660 =
  30. 30.10% of 140 =
  31. 31.25% of 430 =
  32. 32.15% of 650 =
  33. 33.25% of 290 =
  34. 34.5% of 420 =
  35. 35.10% of 840 =
  36. 36.20% of 440 =
  37. 37.1% of 490 =
  38. 38.50% of 590 =
  39. 39.50% of 460 =
  40. 40.5% of 240 =

Answer key

  1. 50
  2. 68
  3. 104
  4. 127.5
  5. 53
  6. 40.5
  7. 8
  8. 185
  9. 385
  10. 385
  11. 28.5
  12. 135
  13. 40
  14. 77.5
  15. 45
  16. 40.5
  17. 31
  18. 5.5
  19. 62.5
  20. 176
  21. 70
  22. 7.5
  23. 79
  24. 32.5
  25. 15
  26. 12.5
  27. 79
  28. 40.5
  29. 99
  30. 14
  31. 107.5
  32. 97.5
  33. 72.5
  34. 21
  35. 84
  36. 88
  37. 4.9
  38. 295
  39. 230
  40. 12

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