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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 37 · 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 100 =
  2. 2.10% of 430 =
  3. 3.25% of 760 =
  4. 4.1% of 70 =
  5. 5.50% of 600 =
  6. 6.25% of 270 =
  7. 7.25% of 600 =
  8. 8.5% of 90 =
  9. 9.50% of 810 =
  10. 10.50% of 350 =
  11. 11.1% of 210 =
  12. 12.15% of 40 =
  13. 13.15% of 590 =
  14. 14.1% of 70 =
  15. 15.15% of 200 =
  16. 16.5% of 620 =
  17. 17.50% of 20 =
  18. 18.50% of 630 =
  19. 19.25% of 170 =
  20. 20.10% of 440 =
  21. 21.10% of 340 =
  22. 22.25% of 660 =
  23. 23.15% of 670 =
  24. 24.5% of 900 =
  25. 25.10% of 230 =
  26. 26.5% of 320 =
  27. 27.50% of 180 =
  28. 28.15% of 230 =
  29. 29.15% of 640 =
  30. 30.25% of 750 =
  31. 31.50% of 480 =
  32. 32.1% of 880 =
  33. 33.20% of 310 =
  34. 34.15% of 260 =
  35. 35.1% of 50 =
  36. 36.10% of 620 =
  37. 37.10% of 30 =
  38. 38.50% of 440 =
  39. 39.1% of 50 =
  40. 40.5% of 530 =

Answer key

  1. 10
  2. 43
  3. 190
  4. 0.7
  5. 300
  6. 67.5
  7. 150
  8. 4.5
  9. 405
  10. 175
  11. 2.1
  12. 6
  13. 88.5
  14. 0.7
  15. 30
  16. 31
  17. 10
  18. 315
  19. 42.5
  20. 44
  21. 34
  22. 165
  23. 100.5
  24. 45
  25. 23
  26. 16
  27. 90
  28. 34.5
  29. 96
  30. 187.5
  31. 240
  32. 8.8
  33. 62
  34. 39
  35. 0.5
  36. 62
  37. 3
  38. 220
  39. 0.5
  40. 26.5

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