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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 107 · 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. 2.5% of 360 =
  3. 3.20% of 740 =
  4. 4.5% of 30 =
  5. 5.10% of 260 =
  6. 6.10% of 490 =
  7. 7.15% of 180 =
  8. 8.10% of 150 =
  9. 9.5% of 760 =
  10. 10.5% of 220 =
  11. 11.5% of 350 =
  12. 12.10% of 780 =
  13. 13.1% of 680 =
  14. 14.50% of 650 =
  15. 15.20% of 590 =
  16. 16.20% of 150 =
  17. 17.20% of 450 =
  18. 18.20% of 620 =
  19. 19.50% of 890 =
  20. 20.5% of 810 =
  21. 21.10% of 780 =
  22. 22.1% of 110 =
  23. 23.25% of 480 =
  24. 24.1% of 150 =
  25. 25.25% of 150 =
  26. 26.5% of 770 =
  27. 27.5% of 340 =
  28. 28.25% of 690 =
  29. 29.20% of 550 =
  30. 30.15% of 850 =
  31. 31.20% of 460 =
  32. 32.50% of 380 =
  33. 33.25% of 100 =
  34. 34.10% of 670 =
  35. 35.25% of 280 =
  36. 36.5% of 200 =
  37. 37.25% of 710 =
  38. 38.5% of 180 =
  39. 39.5% of 670 =
  40. 40.50% of 790 =

Answer key

  1. 33
  2. 18
  3. 148
  4. 1.5
  5. 26
  6. 49
  7. 27
  8. 15
  9. 38
  10. 11
  11. 17.5
  12. 78
  13. 6.8
  14. 325
  15. 118
  16. 30
  17. 90
  18. 124
  19. 445
  20. 40.5
  21. 78
  22. 1.1
  23. 120
  24. 1.5
  25. 37.5
  26. 38.5
  27. 17
  28. 172.5
  29. 110
  30. 127.5
  31. 92
  32. 190
  33. 25
  34. 67
  35. 70
  36. 10
  37. 177.5
  38. 9
  39. 33.5
  40. 395

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