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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 507 · 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. 1.25% of 750 =
  2. 2.15% of 20 =
  3. 3.25% of 830 =
  4. 4.20% of 810 =
  5. 5.10% of 150 =
  6. 6.5% of 190 =
  7. 7.5% of 340 =
  8. 8.50% of 780 =
  9. 9.20% of 50 =
  10. 10.10% of 390 =
  11. 11.50% of 550 =
  12. 12.25% of 680 =
  13. 13.10% of 490 =
  14. 14.25% of 100 =
  15. 15.15% of 670 =
  16. 16.1% of 570 =
  17. 17.5% of 140 =
  18. 18.25% of 780 =
  19. 19.10% of 60 =
  20. 20.1% of 780 =
  21. 21.5% of 190 =
  22. 22.20% of 330 =
  23. 23.20% of 350 =
  24. 24.20% of 200 =
  25. 25.1% of 630 =
  26. 26.20% of 250 =
  27. 27.25% of 740 =
  28. 28.10% of 310 =
  29. 29.10% of 490 =
  30. 30.10% of 840 =
  31. 31.5% of 630 =
  32. 32.20% of 660 =
  33. 33.5% of 750 =
  34. 34.5% of 250 =
  35. 35.5% of 400 =
  36. 36.5% of 740 =
  37. 37.1% of 230 =
  38. 38.15% of 890 =
  39. 39.50% of 70 =
  40. 40.15% of 860 =

Answer key

  1. 187.5
  2. 3
  3. 207.5
  4. 162
  5. 15
  6. 9.5
  7. 17
  8. 390
  9. 10
  10. 39
  11. 275
  12. 170
  13. 49
  14. 25
  15. 100.5
  16. 5.7
  17. 7
  18. 195
  19. 6
  20. 7.8
  21. 9.5
  22. 66
  23. 70
  24. 40
  25. 6.3
  26. 50
  27. 185
  28. 31
  29. 49
  30. 84
  31. 31.5
  32. 132
  33. 37.5
  34. 12.5
  35. 20
  36. 37
  37. 2.3
  38. 133.5
  39. 35
  40. 129

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