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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 445 · 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 90 =
  2. 2.20% of 640 =
  3. 3.1% of 120 =
  4. 4.1% of 220 =
  5. 5.5% of 850 =
  6. 6.25% of 480 =
  7. 7.1% of 400 =
  8. 8.5% of 110 =
  9. 9.15% of 360 =
  10. 10.25% of 900 =
  11. 11.1% of 280 =
  12. 12.15% of 60 =
  13. 13.5% of 570 =
  14. 14.50% of 410 =
  15. 15.10% of 780 =
  16. 16.20% of 300 =
  17. 17.50% of 200 =
  18. 18.5% of 410 =
  19. 19.50% of 670 =
  20. 20.50% of 640 =
  21. 21.1% of 120 =
  22. 22.50% of 410 =
  23. 23.10% of 20 =
  24. 24.50% of 690 =
  25. 25.25% of 230 =
  26. 26.10% of 530 =
  27. 27.1% of 150 =
  28. 28.50% of 70 =
  29. 29.25% of 650 =
  30. 30.10% of 650 =
  31. 31.20% of 530 =
  32. 32.20% of 730 =
  33. 33.50% of 280 =
  34. 34.1% of 640 =
  35. 35.50% of 160 =
  36. 36.15% of 430 =
  37. 37.15% of 700 =
  38. 38.15% of 670 =
  39. 39.15% of 280 =
  40. 40.25% of 130 =

Answer key

  1. 18
  2. 128
  3. 1.2
  4. 2.2
  5. 42.5
  6. 120
  7. 4
  8. 5.5
  9. 54
  10. 225
  11. 2.8
  12. 9
  13. 28.5
  14. 205
  15. 78
  16. 60
  17. 100
  18. 20.5
  19. 335
  20. 320
  21. 1.2
  22. 205
  23. 2
  24. 345
  25. 57.5
  26. 53
  27. 1.5
  28. 35
  29. 162.5
  30. 65
  31. 106
  32. 146
  33. 140
  34. 6.4
  35. 80
  36. 64.5
  37. 105
  38. 100.5
  39. 42
  40. 32.5

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