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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 198 · 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 430 =
  2. 2.50% of 40 =
  3. 3.20% of 520 =
  4. 4.50% of 100 =
  5. 5.15% of 720 =
  6. 6.10% of 420 =
  7. 7.1% of 760 =
  8. 8.1% of 170 =
  9. 9.5% of 100 =
  10. 10.20% of 640 =
  11. 11.1% of 850 =
  12. 12.10% of 390 =
  13. 13.1% of 320 =
  14. 14.25% of 810 =
  15. 15.25% of 800 =
  16. 16.1% of 870 =
  17. 17.50% of 230 =
  18. 18.10% of 530 =
  19. 19.25% of 150 =
  20. 20.25% of 350 =
  21. 21.1% of 870 =
  22. 22.10% of 880 =
  23. 23.15% of 550 =
  24. 24.1% of 690 =
  25. 25.20% of 310 =
  26. 26.25% of 200 =
  27. 27.5% of 590 =
  28. 28.15% of 520 =
  29. 29.15% of 350 =
  30. 30.25% of 890 =
  31. 31.10% of 340 =
  32. 32.10% of 430 =
  33. 33.50% of 860 =
  34. 34.5% of 780 =
  35. 35.5% of 620 =
  36. 36.20% of 840 =
  37. 37.20% of 300 =
  38. 38.1% of 180 =
  39. 39.5% of 390 =
  40. 40.25% of 560 =

Answer key

  1. 43
  2. 20
  3. 104
  4. 50
  5. 108
  6. 42
  7. 7.6
  8. 1.7
  9. 5
  10. 128
  11. 8.5
  12. 39
  13. 3.2
  14. 202.5
  15. 200
  16. 8.7
  17. 115
  18. 53
  19. 37.5
  20. 87.5
  21. 8.7
  22. 88
  23. 82.5
  24. 6.9
  25. 62
  26. 50
  27. 29.5
  28. 78
  29. 52.5
  30. 222.5
  31. 34
  32. 43
  33. 430
  34. 39
  35. 31
  36. 168
  37. 60
  38. 1.8
  39. 19.5
  40. 140

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