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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 644 · 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. 1.50% of 200 =
  2. 2.15% of 500 =
  3. 3.10% of 460 =
  4. 4.10% of 210 =
  5. 5.10% of 500 =
  6. 6.50% of 460 =
  7. 7.15% of 20 =
  8. 8.20% of 590 =
  9. 9.50% of 490 =
  10. 10.5% of 60 =
  11. 11.10% of 80 =
  12. 12.25% of 250 =
  13. 13.1% of 280 =
  14. 14.20% of 890 =
  15. 15.20% of 300 =
  16. 16.5% of 850 =
  17. 17.25% of 110 =
  18. 18.50% of 290 =
  19. 19.25% of 520 =
  20. 20.1% of 80 =
  21. 21.5% of 60 =
  22. 22.25% of 30 =
  23. 23.5% of 110 =
  24. 24.5% of 670 =
  25. 25.25% of 20 =
  26. 26.15% of 530 =
  27. 27.15% of 270 =
  28. 28.5% of 650 =
  29. 29.10% of 330 =
  30. 30.5% of 380 =
  31. 31.15% of 20 =
  32. 32.50% of 540 =
  33. 33.5% of 790 =
  34. 34.50% of 550 =
  35. 35.25% of 500 =
  36. 36.5% of 50 =
  37. 37.20% of 190 =
  38. 38.15% of 590 =
  39. 39.15% of 780 =
  40. 40.15% of 30 =

Answer key

  1. 100
  2. 75
  3. 46
  4. 21
  5. 50
  6. 230
  7. 3
  8. 118
  9. 245
  10. 3
  11. 8
  12. 62.5
  13. 2.8
  14. 178
  15. 60
  16. 42.5
  17. 27.5
  18. 145
  19. 130
  20. 0.8
  21. 3
  22. 7.5
  23. 5.5
  24. 33.5
  25. 5
  26. 79.5
  27. 40.5
  28. 32.5
  29. 33
  30. 19
  31. 3
  32. 270
  33. 39.5
  34. 275
  35. 125
  36. 2.5
  37. 38
  38. 88.5
  39. 117
  40. 4.5

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