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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 641 · 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 340 =
  2. 2.5% of 490 =
  3. 3.10% of 520 =
  4. 4.50% of 330 =
  5. 5.5% of 260 =
  6. 6.10% of 270 =
  7. 7.25% of 120 =
  8. 8.50% of 840 =
  9. 9.20% of 100 =
  10. 10.15% of 200 =
  11. 11.10% of 550 =
  12. 12.25% of 720 =
  13. 13.1% of 780 =
  14. 14.1% of 700 =
  15. 15.10% of 640 =
  16. 16.10% of 790 =
  17. 17.20% of 250 =
  18. 18.1% of 410 =
  19. 19.5% of 700 =
  20. 20.15% of 240 =
  21. 21.25% of 440 =
  22. 22.25% of 230 =
  23. 23.50% of 360 =
  24. 24.1% of 130 =
  25. 25.15% of 200 =
  26. 26.20% of 850 =
  27. 27.20% of 440 =
  28. 28.25% of 600 =
  29. 29.15% of 410 =
  30. 30.20% of 360 =
  31. 31.50% of 600 =
  32. 32.5% of 650 =
  33. 33.1% of 340 =
  34. 34.10% of 240 =
  35. 35.10% of 520 =
  36. 36.10% of 170 =
  37. 37.15% of 870 =
  38. 38.20% of 530 =
  39. 39.5% of 180 =
  40. 40.1% of 30 =

Answer key

  1. 34
  2. 24.5
  3. 52
  4. 165
  5. 13
  6. 27
  7. 30
  8. 420
  9. 20
  10. 30
  11. 55
  12. 180
  13. 7.8
  14. 7
  15. 64
  16. 79
  17. 50
  18. 4.1
  19. 35
  20. 36
  21. 110
  22. 57.5
  23. 180
  24. 1.3
  25. 30
  26. 170
  27. 88
  28. 150
  29. 61.5
  30. 72
  31. 300
  32. 32.5
  33. 3.4
  34. 24
  35. 52
  36. 17
  37. 130.5
  38. 106
  39. 9
  40. 0.3

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