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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 101 · 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 160 =
  2. 2.15% of 140 =
  3. 3.50% of 50 =
  4. 4.25% of 880 =
  5. 5.10% of 610 =
  6. 6.1% of 270 =
  7. 7.15% of 150 =
  8. 8.5% of 630 =
  9. 9.10% of 570 =
  10. 10.1% of 100 =
  11. 11.20% of 270 =
  12. 12.10% of 20 =
  13. 13.20% of 90 =
  14. 14.20% of 710 =
  15. 15.50% of 440 =
  16. 16.5% of 510 =
  17. 17.5% of 330 =
  18. 18.25% of 460 =
  19. 19.25% of 290 =
  20. 20.10% of 660 =
  21. 21.10% of 60 =
  22. 22.20% of 150 =
  23. 23.10% of 460 =
  24. 24.5% of 240 =
  25. 25.5% of 790 =
  26. 26.15% of 140 =
  27. 27.50% of 160 =
  28. 28.10% of 760 =
  29. 29.15% of 430 =
  30. 30.5% of 590 =
  31. 31.25% of 320 =
  32. 32.10% of 840 =
  33. 33.5% of 340 =
  34. 34.25% of 420 =
  35. 35.50% of 20 =
  36. 36.25% of 380 =
  37. 37.10% of 50 =
  38. 38.25% of 800 =
  39. 39.25% of 870 =
  40. 40.10% of 120 =

Answer key

  1. 32
  2. 21
  3. 25
  4. 220
  5. 61
  6. 2.7
  7. 22.5
  8. 31.5
  9. 57
  10. 1
  11. 54
  12. 2
  13. 18
  14. 142
  15. 220
  16. 25.5
  17. 16.5
  18. 115
  19. 72.5
  20. 66
  21. 6
  22. 30
  23. 46
  24. 12
  25. 39.5
  26. 21
  27. 80
  28. 76
  29. 64.5
  30. 29.5
  31. 80
  32. 84
  33. 17
  34. 105
  35. 10
  36. 95
  37. 5
  38. 200
  39. 217.5
  40. 12

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