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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 112 · 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 100 =
  2. 2.5% of 900 =
  3. 3.20% of 230 =
  4. 4.25% of 840 =
  5. 5.20% of 340 =
  6. 6.5% of 730 =
  7. 7.20% of 510 =
  8. 8.15% of 250 =
  9. 9.25% of 840 =
  10. 10.15% of 300 =
  11. 11.15% of 810 =
  12. 12.20% of 180 =
  13. 13.50% of 570 =
  14. 14.5% of 460 =
  15. 15.1% of 290 =
  16. 16.50% of 600 =
  17. 17.20% of 350 =
  18. 18.10% of 510 =
  19. 19.10% of 100 =
  20. 20.10% of 570 =
  21. 21.5% of 220 =
  22. 22.5% of 410 =
  23. 23.5% of 200 =
  24. 24.50% of 770 =
  25. 25.5% of 110 =
  26. 26.25% of 900 =
  27. 27.50% of 400 =
  28. 28.5% of 20 =
  29. 29.10% of 20 =
  30. 30.25% of 770 =
  31. 31.5% of 370 =
  32. 32.50% of 80 =
  33. 33.15% of 170 =
  34. 34.1% of 220 =
  35. 35.25% of 550 =
  36. 36.20% of 40 =
  37. 37.25% of 700 =
  38. 38.20% of 190 =
  39. 39.1% of 330 =
  40. 40.15% of 530 =

Answer key

  1. 25
  2. 45
  3. 46
  4. 210
  5. 68
  6. 36.5
  7. 102
  8. 37.5
  9. 210
  10. 45
  11. 121.5
  12. 36
  13. 285
  14. 23
  15. 2.9
  16. 300
  17. 70
  18. 51
  19. 10
  20. 57
  21. 11
  22. 20.5
  23. 10
  24. 385
  25. 5.5
  26. 225
  27. 200
  28. 1
  29. 2
  30. 192.5
  31. 18.5
  32. 40
  33. 25.5
  34. 2.2
  35. 137.5
  36. 8
  37. 175
  38. 38
  39. 3.3
  40. 79.5

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