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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 93 · 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. 1.25% of 40 =
  2. 2.20% of 280 =
  3. 3.50% of 470 =
  4. 4.25% of 290 =
  5. 5.15% of 430 =
  6. 6.5% of 810 =
  7. 7.1% of 240 =
  8. 8.15% of 240 =
  9. 9.25% of 840 =
  10. 10.10% of 470 =
  11. 11.15% of 670 =
  12. 12.5% of 480 =
  13. 13.25% of 820 =
  14. 14.15% of 310 =
  15. 15.10% of 830 =
  16. 16.20% of 80 =
  17. 17.10% of 660 =
  18. 18.1% of 120 =
  19. 19.15% of 90 =
  20. 20.20% of 550 =
  21. 21.5% of 250 =
  22. 22.1% of 160 =
  23. 23.10% of 500 =
  24. 24.1% of 720 =
  25. 25.10% of 370 =
  26. 26.5% of 310 =
  27. 27.25% of 180 =
  28. 28.5% of 20 =
  29. 29.50% of 200 =
  30. 30.15% of 390 =
  31. 31.50% of 30 =
  32. 32.15% of 650 =
  33. 33.25% of 310 =
  34. 34.20% of 90 =
  35. 35.20% of 870 =
  36. 36.50% of 610 =
  37. 37.20% of 490 =
  38. 38.25% of 210 =
  39. 39.15% of 590 =
  40. 40.10% of 850 =

Answer key

  1. 10
  2. 56
  3. 235
  4. 72.5
  5. 64.5
  6. 40.5
  7. 2.4
  8. 36
  9. 210
  10. 47
  11. 100.5
  12. 24
  13. 205
  14. 46.5
  15. 83
  16. 16
  17. 66
  18. 1.2
  19. 13.5
  20. 110
  21. 12.5
  22. 1.6
  23. 50
  24. 7.2
  25. 37
  26. 15.5
  27. 45
  28. 1
  29. 100
  30. 58.5
  31. 15
  32. 97.5
  33. 77.5
  34. 18
  35. 174
  36. 305
  37. 98
  38. 52.5
  39. 88.5
  40. 85

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