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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 511 · 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 820 =
  2. 2.10% of 610 =
  3. 3.15% of 20 =
  4. 4.25% of 250 =
  5. 5.10% of 290 =
  6. 6.25% of 830 =
  7. 7.5% of 810 =
  8. 8.10% of 340 =
  9. 9.10% of 880 =
  10. 10.10% of 840 =
  11. 11.20% of 100 =
  12. 12.1% of 30 =
  13. 13.20% of 230 =
  14. 14.50% of 70 =
  15. 15.1% of 220 =
  16. 16.25% of 580 =
  17. 17.5% of 130 =
  18. 18.1% of 600 =
  19. 19.10% of 800 =
  20. 20.20% of 450 =
  21. 21.50% of 170 =
  22. 22.10% of 100 =
  23. 23.15% of 520 =
  24. 24.15% of 770 =
  25. 25.5% of 160 =
  26. 26.50% of 300 =
  27. 27.20% of 80 =
  28. 28.10% of 320 =
  29. 29.15% of 610 =
  30. 30.50% of 90 =
  31. 31.15% of 830 =
  32. 32.1% of 320 =
  33. 33.10% of 90 =
  34. 34.10% of 500 =
  35. 35.15% of 610 =
  36. 36.25% of 70 =
  37. 37.15% of 320 =
  38. 38.25% of 270 =
  39. 39.1% of 370 =
  40. 40.20% of 610 =

Answer key

  1. 82
  2. 61
  3. 3
  4. 62.5
  5. 29
  6. 207.5
  7. 40.5
  8. 34
  9. 88
  10. 84
  11. 20
  12. 0.3
  13. 46
  14. 35
  15. 2.2
  16. 145
  17. 6.5
  18. 6
  19. 80
  20. 90
  21. 85
  22. 10
  23. 78
  24. 115.5
  25. 8
  26. 150
  27. 16
  28. 32
  29. 91.5
  30. 45
  31. 124.5
  32. 3.2
  33. 9
  34. 50
  35. 91.5
  36. 17.5
  37. 48
  38. 67.5
  39. 3.7
  40. 122

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