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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 97 · 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. 1.20% of 870 =
  2. 2.5% of 590 =
  3. 3.5% of 760 =
  4. 4.15% of 300 =
  5. 5.50% of 760 =
  6. 6.50% of 110 =
  7. 7.1% of 800 =
  8. 8.1% of 520 =
  9. 9.5% of 110 =
  10. 10.10% of 170 =
  11. 11.10% of 530 =
  12. 12.25% of 30 =
  13. 13.1% of 250 =
  14. 14.5% of 20 =
  15. 15.10% of 140 =
  16. 16.50% of 660 =
  17. 17.10% of 40 =
  18. 18.1% of 720 =
  19. 19.5% of 250 =
  20. 20.5% of 70 =
  21. 21.25% of 30 =
  22. 22.25% of 760 =
  23. 23.5% of 750 =
  24. 24.1% of 800 =
  25. 25.20% of 710 =
  26. 26.10% of 330 =
  27. 27.5% of 50 =
  28. 28.1% of 210 =
  29. 29.10% of 830 =
  30. 30.15% of 770 =
  31. 31.1% of 710 =
  32. 32.20% of 560 =
  33. 33.5% of 300 =
  34. 34.20% of 860 =
  35. 35.5% of 160 =
  36. 36.25% of 190 =
  37. 37.50% of 330 =
  38. 38.15% of 550 =
  39. 39.25% of 610 =
  40. 40.15% of 540 =

Answer key

  1. 174
  2. 29.5
  3. 38
  4. 45
  5. 380
  6. 55
  7. 8
  8. 5.2
  9. 5.5
  10. 17
  11. 53
  12. 7.5
  13. 2.5
  14. 1
  15. 14
  16. 330
  17. 4
  18. 7.2
  19. 12.5
  20. 3.5
  21. 7.5
  22. 190
  23. 37.5
  24. 8
  25. 142
  26. 33
  27. 2.5
  28. 2.1
  29. 83
  30. 115.5
  31. 7.1
  32. 112
  33. 15
  34. 172
  35. 8
  36. 47.5
  37. 165
  38. 82.5
  39. 152.5
  40. 81

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