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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 412 · 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 90 =
  2. 2.10% of 310 =
  3. 3.25% of 70 =
  4. 4.5% of 110 =
  5. 5.50% of 230 =
  6. 6.15% of 740 =
  7. 7.20% of 700 =
  8. 8.25% of 50 =
  9. 9.5% of 390 =
  10. 10.50% of 770 =
  11. 11.20% of 870 =
  12. 12.10% of 880 =
  13. 13.5% of 190 =
  14. 14.15% of 200 =
  15. 15.10% of 470 =
  16. 16.25% of 360 =
  17. 17.5% of 570 =
  18. 18.10% of 470 =
  19. 19.5% of 30 =
  20. 20.1% of 250 =
  21. 21.50% of 840 =
  22. 22.20% of 550 =
  23. 23.50% of 260 =
  24. 24.20% of 220 =
  25. 25.1% of 120 =
  26. 26.20% of 290 =
  27. 27.50% of 50 =
  28. 28.1% of 660 =
  29. 29.50% of 720 =
  30. 30.50% of 850 =
  31. 31.1% of 140 =
  32. 32.20% of 470 =
  33. 33.10% of 760 =
  34. 34.25% of 840 =
  35. 35.25% of 90 =
  36. 36.5% of 560 =
  37. 37.15% of 680 =
  38. 38.5% of 30 =
  39. 39.10% of 690 =
  40. 40.5% of 140 =

Answer key

  1. 4.5
  2. 31
  3. 17.5
  4. 5.5
  5. 115
  6. 111
  7. 140
  8. 12.5
  9. 19.5
  10. 385
  11. 174
  12. 88
  13. 9.5
  14. 30
  15. 47
  16. 90
  17. 28.5
  18. 47
  19. 1.5
  20. 2.5
  21. 420
  22. 110
  23. 130
  24. 44
  25. 1.2
  26. 58
  27. 25
  28. 6.6
  29. 360
  30. 425
  31. 1.4
  32. 94
  33. 76
  34. 210
  35. 22.5
  36. 28
  37. 102
  38. 1.5
  39. 69
  40. 7

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