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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 195 · 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. 1.15% of 220 =
  2. 2.15% of 400 =
  3. 3.25% of 840 =
  4. 4.25% of 490 =
  5. 5.10% of 220 =
  6. 6.10% of 90 =
  7. 7.10% of 500 =
  8. 8.10% of 380 =
  9. 9.15% of 410 =
  10. 10.20% of 850 =
  11. 11.5% of 460 =
  12. 12.5% of 190 =
  13. 13.20% of 530 =
  14. 14.15% of 570 =
  15. 15.50% of 700 =
  16. 16.20% of 720 =
  17. 17.15% of 400 =
  18. 18.5% of 830 =
  19. 19.25% of 110 =
  20. 20.1% of 350 =
  21. 21.25% of 530 =
  22. 22.1% of 720 =
  23. 23.15% of 740 =
  24. 24.15% of 690 =
  25. 25.20% of 660 =
  26. 26.5% of 100 =
  27. 27.5% of 420 =
  28. 28.5% of 550 =
  29. 29.5% of 710 =
  30. 30.20% of 360 =
  31. 31.1% of 530 =
  32. 32.5% of 730 =
  33. 33.25% of 900 =
  34. 34.25% of 400 =
  35. 35.25% of 260 =
  36. 36.20% of 640 =
  37. 37.10% of 130 =
  38. 38.25% of 150 =
  39. 39.20% of 530 =
  40. 40.5% of 160 =

Answer key

  1. 33
  2. 60
  3. 210
  4. 122.5
  5. 22
  6. 9
  7. 50
  8. 38
  9. 61.5
  10. 170
  11. 23
  12. 9.5
  13. 106
  14. 85.5
  15. 350
  16. 144
  17. 60
  18. 41.5
  19. 27.5
  20. 3.5
  21. 132.5
  22. 7.2
  23. 111
  24. 103.5
  25. 132
  26. 5
  27. 21
  28. 27.5
  29. 35.5
  30. 72
  31. 5.3
  32. 36.5
  33. 225
  34. 100
  35. 65
  36. 128
  37. 13
  38. 37.5
  39. 106
  40. 8

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