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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 828 · 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. 1.10% of 330 =
  2. 2.20% of 210 =
  3. 3.50% of 410 =
  4. 4.50% of 530 =
  5. 5.20% of 570 =
  6. 6.10% of 640 =
  7. 7.25% of 270 =
  8. 8.50% of 770 =
  9. 9.15% of 190 =
  10. 10.50% of 50 =
  11. 11.15% of 560 =
  12. 12.50% of 250 =
  13. 13.10% of 870 =
  14. 14.5% of 40 =
  15. 15.1% of 100 =
  16. 16.5% of 790 =
  17. 17.1% of 580 =
  18. 18.25% of 800 =
  19. 19.10% of 440 =
  20. 20.20% of 900 =
  21. 21.25% of 850 =
  22. 22.25% of 40 =
  23. 23.50% of 160 =
  24. 24.1% of 120 =
  25. 25.15% of 780 =
  26. 26.10% of 800 =
  27. 27.25% of 660 =
  28. 28.20% of 620 =
  29. 29.1% of 380 =
  30. 30.15% of 110 =
  31. 31.50% of 580 =
  32. 32.20% of 320 =
  33. 33.15% of 570 =
  34. 34.20% of 770 =
  35. 35.15% of 90 =
  36. 36.20% of 610 =
  37. 37.25% of 720 =
  38. 38.15% of 750 =
  39. 39.25% of 530 =
  40. 40.5% of 190 =

Answer key

  1. 33
  2. 42
  3. 205
  4. 265
  5. 114
  6. 64
  7. 67.5
  8. 385
  9. 28.5
  10. 25
  11. 84
  12. 125
  13. 87
  14. 2
  15. 1
  16. 39.5
  17. 5.8
  18. 200
  19. 44
  20. 180
  21. 212.5
  22. 10
  23. 80
  24. 1.2
  25. 117
  26. 80
  27. 165
  28. 124
  29. 3.8
  30. 16.5
  31. 290
  32. 64
  33. 85.5
  34. 154
  35. 13.5
  36. 122
  37. 180
  38. 112.5
  39. 132.5
  40. 9.5

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