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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 163 · 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 120 =
  2. 2.10% of 830 =
  3. 3.1% of 780 =
  4. 4.1% of 20 =
  5. 5.5% of 810 =
  6. 6.5% of 210 =
  7. 7.10% of 640 =
  8. 8.20% of 870 =
  9. 9.10% of 150 =
  10. 10.10% of 670 =
  11. 11.20% of 540 =
  12. 12.15% of 830 =
  13. 13.15% of 630 =
  14. 14.1% of 60 =
  15. 15.50% of 770 =
  16. 16.20% of 530 =
  17. 17.15% of 80 =
  18. 18.5% of 30 =
  19. 19.50% of 50 =
  20. 20.20% of 840 =
  21. 21.20% of 750 =
  22. 22.5% of 100 =
  23. 23.10% of 600 =
  24. 24.20% of 480 =
  25. 25.5% of 30 =
  26. 26.25% of 320 =
  27. 27.25% of 30 =
  28. 28.25% of 530 =
  29. 29.5% of 30 =
  30. 30.50% of 510 =
  31. 31.5% of 30 =
  32. 32.20% of 190 =
  33. 33.25% of 520 =
  34. 34.10% of 400 =
  35. 35.25% of 210 =
  36. 36.10% of 120 =
  37. 37.5% of 110 =
  38. 38.1% of 620 =
  39. 39.20% of 670 =
  40. 40.15% of 210 =

Answer key

  1. 6
  2. 83
  3. 7.8
  4. 0.2
  5. 40.5
  6. 10.5
  7. 64
  8. 174
  9. 15
  10. 67
  11. 108
  12. 124.5
  13. 94.5
  14. 0.6
  15. 385
  16. 106
  17. 12
  18. 1.5
  19. 25
  20. 168
  21. 150
  22. 5
  23. 60
  24. 96
  25. 1.5
  26. 80
  27. 7.5
  28. 132.5
  29. 1.5
  30. 255
  31. 1.5
  32. 38
  33. 130
  34. 40
  35. 52.5
  36. 12
  37. 5.5
  38. 6.2
  39. 134
  40. 31.5

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