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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 369 · 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. 1.5% of 780 =
  2. 2.20% of 250 =
  3. 3.10% of 450 =
  4. 4.5% of 300 =
  5. 5.15% of 620 =
  6. 6.1% of 490 =
  7. 7.15% of 880 =
  8. 8.50% of 40 =
  9. 9.1% of 490 =
  10. 10.25% of 630 =
  11. 11.5% of 80 =
  12. 12.20% of 890 =
  13. 13.10% of 400 =
  14. 14.10% of 50 =
  15. 15.10% of 500 =
  16. 16.15% of 350 =
  17. 17.5% of 460 =
  18. 18.1% of 870 =
  19. 19.15% of 40 =
  20. 20.15% of 20 =
  21. 21.10% of 70 =
  22. 22.5% of 370 =
  23. 23.5% of 20 =
  24. 24.5% of 160 =
  25. 25.20% of 710 =
  26. 26.5% of 890 =
  27. 27.50% of 840 =
  28. 28.15% of 350 =
  29. 29.15% of 600 =
  30. 30.20% of 100 =
  31. 31.15% of 850 =
  32. 32.15% of 400 =
  33. 33.10% of 410 =
  34. 34.15% of 110 =
  35. 35.15% of 450 =
  36. 36.10% of 870 =
  37. 37.5% of 580 =
  38. 38.1% of 880 =
  39. 39.50% of 460 =
  40. 40.25% of 360 =

Answer key

  1. 39
  2. 50
  3. 45
  4. 15
  5. 93
  6. 4.9
  7. 132
  8. 20
  9. 4.9
  10. 157.5
  11. 4
  12. 178
  13. 40
  14. 5
  15. 50
  16. 52.5
  17. 23
  18. 8.7
  19. 6
  20. 3
  21. 7
  22. 18.5
  23. 1
  24. 8
  25. 142
  26. 44.5
  27. 420
  28. 52.5
  29. 90
  30. 20
  31. 127.5
  32. 60
  33. 41
  34. 16.5
  35. 67.5
  36. 87
  37. 29
  38. 8.8
  39. 230
  40. 90

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