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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 672 · 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 190 =
  2. 2.1% of 270 =
  3. 3.15% of 230 =
  4. 4.5% of 20 =
  5. 5.25% of 390 =
  6. 6.5% of 190 =
  7. 7.1% of 460 =
  8. 8.5% of 70 =
  9. 9.10% of 600 =
  10. 10.15% of 850 =
  11. 11.5% of 120 =
  12. 12.50% of 490 =
  13. 13.20% of 430 =
  14. 14.25% of 550 =
  15. 15.25% of 610 =
  16. 16.20% of 90 =
  17. 17.5% of 130 =
  18. 18.15% of 520 =
  19. 19.10% of 290 =
  20. 20.10% of 500 =
  21. 21.20% of 800 =
  22. 22.20% of 100 =
  23. 23.20% of 190 =
  24. 24.5% of 500 =
  25. 25.50% of 390 =
  26. 26.15% of 150 =
  27. 27.20% of 510 =
  28. 28.10% of 890 =
  29. 29.25% of 430 =
  30. 30.15% of 150 =
  31. 31.50% of 40 =
  32. 32.1% of 790 =
  33. 33.10% of 480 =
  34. 34.5% of 290 =
  35. 35.50% of 880 =
  36. 36.1% of 580 =
  37. 37.50% of 860 =
  38. 38.5% of 120 =
  39. 39.20% of 490 =
  40. 40.15% of 200 =

Answer key

  1. 9.5
  2. 2.7
  3. 34.5
  4. 1
  5. 97.5
  6. 9.5
  7. 4.6
  8. 3.5
  9. 60
  10. 127.5
  11. 6
  12. 245
  13. 86
  14. 137.5
  15. 152.5
  16. 18
  17. 6.5
  18. 78
  19. 29
  20. 50
  21. 160
  22. 20
  23. 38
  24. 25
  25. 195
  26. 22.5
  27. 102
  28. 89
  29. 107.5
  30. 22.5
  31. 20
  32. 7.9
  33. 48
  34. 14.5
  35. 440
  36. 5.8
  37. 430
  38. 6
  39. 98
  40. 30

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