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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 719 · 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 170 =
  2. 2.15% of 690 =
  3. 3.5% of 500 =
  4. 4.50% of 620 =
  5. 5.15% of 820 =
  6. 6.1% of 20 =
  7. 7.20% of 510 =
  8. 8.15% of 100 =
  9. 9.15% of 690 =
  10. 10.10% of 750 =
  11. 11.15% of 660 =
  12. 12.15% of 500 =
  13. 13.50% of 750 =
  14. 14.25% of 720 =
  15. 15.50% of 90 =
  16. 16.15% of 30 =
  17. 17.10% of 520 =
  18. 18.5% of 50 =
  19. 19.10% of 120 =
  20. 20.10% of 560 =
  21. 21.10% of 220 =
  22. 22.50% of 200 =
  23. 23.50% of 200 =
  24. 24.15% of 260 =
  25. 25.20% of 480 =
  26. 26.5% of 620 =
  27. 27.25% of 850 =
  28. 28.15% of 620 =
  29. 29.20% of 830 =
  30. 30.1% of 420 =
  31. 31.5% of 450 =
  32. 32.1% of 880 =
  33. 33.25% of 470 =
  34. 34.20% of 110 =
  35. 35.10% of 440 =
  36. 36.1% of 150 =
  37. 37.10% of 520 =
  38. 38.1% of 260 =
  39. 39.20% of 90 =
  40. 40.5% of 790 =

Answer key

  1. 17
  2. 103.5
  3. 25
  4. 310
  5. 123
  6. 0.2
  7. 102
  8. 15
  9. 103.5
  10. 75
  11. 99
  12. 75
  13. 375
  14. 180
  15. 45
  16. 4.5
  17. 52
  18. 2.5
  19. 12
  20. 56
  21. 22
  22. 100
  23. 100
  24. 39
  25. 96
  26. 31
  27. 212.5
  28. 93
  29. 166
  30. 4.2
  31. 22.5
  32. 8.8
  33. 117.5
  34. 22
  35. 44
  36. 1.5
  37. 52
  38. 2.6
  39. 18
  40. 39.5

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