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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 270 · 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. 1.20% of 20 =
  2. 2.1% of 820 =
  3. 3.15% of 790 =
  4. 4.10% of 220 =
  5. 5.1% of 360 =
  6. 6.15% of 80 =
  7. 7.10% of 220 =
  8. 8.50% of 790 =
  9. 9.20% of 380 =
  10. 10.5% of 690 =
  11. 11.15% of 70 =
  12. 12.15% of 830 =
  13. 13.1% of 280 =
  14. 14.25% of 220 =
  15. 15.1% of 670 =
  16. 16.5% of 680 =
  17. 17.15% of 830 =
  18. 18.50% of 850 =
  19. 19.5% of 700 =
  20. 20.5% of 260 =
  21. 21.10% of 370 =
  22. 22.1% of 520 =
  23. 23.5% of 690 =
  24. 24.10% of 760 =
  25. 25.50% of 870 =
  26. 26.1% of 460 =
  27. 27.25% of 900 =
  28. 28.50% of 180 =
  29. 29.20% of 680 =
  30. 30.5% of 750 =
  31. 31.5% of 640 =
  32. 32.1% of 320 =
  33. 33.15% of 830 =
  34. 34.20% of 20 =
  35. 35.25% of 330 =
  36. 36.15% of 710 =
  37. 37.20% of 90 =
  38. 38.15% of 90 =
  39. 39.10% of 400 =
  40. 40.10% of 120 =

Answer key

  1. 4
  2. 8.2
  3. 118.5
  4. 22
  5. 3.6
  6. 12
  7. 22
  8. 395
  9. 76
  10. 34.5
  11. 10.5
  12. 124.5
  13. 2.8
  14. 55
  15. 6.7
  16. 34
  17. 124.5
  18. 425
  19. 35
  20. 13
  21. 37
  22. 5.2
  23. 34.5
  24. 76
  25. 435
  26. 4.6
  27. 225
  28. 90
  29. 136
  30. 37.5
  31. 32
  32. 3.2
  33. 124.5
  34. 4
  35. 82.5
  36. 106.5
  37. 18
  38. 13.5
  39. 40
  40. 12

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