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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 564 · 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 360 =
  2. 2.50% of 20 =
  3. 3.15% of 900 =
  4. 4.10% of 360 =
  5. 5.10% of 70 =
  6. 6.15% of 720 =
  7. 7.20% of 190 =
  8. 8.10% of 250 =
  9. 9.20% of 840 =
  10. 10.10% of 120 =
  11. 11.1% of 100 =
  12. 12.10% of 510 =
  13. 13.15% of 180 =
  14. 14.10% of 20 =
  15. 15.5% of 600 =
  16. 16.10% of 560 =
  17. 17.50% of 850 =
  18. 18.10% of 300 =
  19. 19.1% of 260 =
  20. 20.10% of 380 =
  21. 21.10% of 560 =
  22. 22.20% of 420 =
  23. 23.50% of 770 =
  24. 24.20% of 170 =
  25. 25.10% of 610 =
  26. 26.25% of 450 =
  27. 27.20% of 290 =
  28. 28.20% of 350 =
  29. 29.25% of 290 =
  30. 30.25% of 830 =
  31. 31.50% of 620 =
  32. 32.15% of 820 =
  33. 33.50% of 180 =
  34. 34.20% of 790 =
  35. 35.1% of 480 =
  36. 36.10% of 510 =
  37. 37.15% of 900 =
  38. 38.10% of 90 =
  39. 39.15% of 90 =
  40. 40.50% of 770 =

Answer key

  1. 36
  2. 10
  3. 135
  4. 36
  5. 7
  6. 108
  7. 38
  8. 25
  9. 168
  10. 12
  11. 1
  12. 51
  13. 27
  14. 2
  15. 30
  16. 56
  17. 425
  18. 30
  19. 2.6
  20. 38
  21. 56
  22. 84
  23. 385
  24. 34
  25. 61
  26. 112.5
  27. 58
  28. 70
  29. 72.5
  30. 207.5
  31. 310
  32. 123
  33. 90
  34. 158
  35. 4.8
  36. 51
  37. 135
  38. 9
  39. 13.5
  40. 385

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