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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 244 · 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. 1.15% of 310 =
  2. 2.10% of 230 =
  3. 3.25% of 690 =
  4. 4.20% of 280 =
  5. 5.50% of 240 =
  6. 6.20% of 680 =
  7. 7.25% of 100 =
  8. 8.15% of 770 =
  9. 9.15% of 870 =
  10. 10.1% of 400 =
  11. 11.10% of 440 =
  12. 12.1% of 350 =
  13. 13.50% of 880 =
  14. 14.10% of 710 =
  15. 15.50% of 250 =
  16. 16.5% of 790 =
  17. 17.5% of 750 =
  18. 18.10% of 100 =
  19. 19.20% of 360 =
  20. 20.50% of 230 =
  21. 21.25% of 260 =
  22. 22.1% of 530 =
  23. 23.15% of 190 =
  24. 24.50% of 700 =
  25. 25.10% of 60 =
  26. 26.15% of 560 =
  27. 27.20% of 770 =
  28. 28.1% of 510 =
  29. 29.5% of 80 =
  30. 30.50% of 350 =
  31. 31.20% of 400 =
  32. 32.20% of 300 =
  33. 33.50% of 30 =
  34. 34.50% of 620 =
  35. 35.50% of 570 =
  36. 36.10% of 390 =
  37. 37.50% of 470 =
  38. 38.5% of 290 =
  39. 39.5% of 570 =
  40. 40.5% of 880 =

Answer key

  1. 46.5
  2. 23
  3. 172.5
  4. 56
  5. 120
  6. 136
  7. 25
  8. 115.5
  9. 130.5
  10. 4
  11. 44
  12. 3.5
  13. 440
  14. 71
  15. 125
  16. 39.5
  17. 37.5
  18. 10
  19. 72
  20. 115
  21. 65
  22. 5.3
  23. 28.5
  24. 350
  25. 6
  26. 84
  27. 154
  28. 5.1
  29. 4
  30. 175
  31. 80
  32. 60
  33. 15
  34. 310
  35. 285
  36. 39
  37. 235
  38. 14.5
  39. 28.5
  40. 44

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