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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 74 · 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 90 =
  2. 2.25% of 510 =
  3. 3.5% of 810 =
  4. 4.50% of 790 =
  5. 5.50% of 70 =
  6. 6.25% of 840 =
  7. 7.15% of 30 =
  8. 8.50% of 900 =
  9. 9.15% of 190 =
  10. 10.10% of 680 =
  11. 11.5% of 450 =
  12. 12.10% of 240 =
  13. 13.1% of 890 =
  14. 14.25% of 550 =
  15. 15.20% of 400 =
  16. 16.5% of 190 =
  17. 17.10% of 260 =
  18. 18.20% of 550 =
  19. 19.15% of 60 =
  20. 20.50% of 110 =
  21. 21.25% of 500 =
  22. 22.5% of 60 =
  23. 23.15% of 140 =
  24. 24.10% of 570 =
  25. 25.5% of 690 =
  26. 26.25% of 830 =
  27. 27.25% of 440 =
  28. 28.50% of 570 =
  29. 29.1% of 390 =
  30. 30.15% of 270 =
  31. 31.15% of 160 =
  32. 32.20% of 60 =
  33. 33.25% of 510 =
  34. 34.1% of 630 =
  35. 35.50% of 120 =
  36. 36.50% of 180 =
  37. 37.25% of 840 =
  38. 38.25% of 800 =
  39. 39.10% of 710 =
  40. 40.10% of 210 =

Answer key

  1. 4.5
  2. 127.5
  3. 40.5
  4. 395
  5. 35
  6. 210
  7. 4.5
  8. 450
  9. 28.5
  10. 68
  11. 22.5
  12. 24
  13. 8.9
  14. 137.5
  15. 80
  16. 9.5
  17. 26
  18. 110
  19. 9
  20. 55
  21. 125
  22. 3
  23. 21
  24. 57
  25. 34.5
  26. 207.5
  27. 110
  28. 285
  29. 3.9
  30. 40.5
  31. 24
  32. 12
  33. 127.5
  34. 6.3
  35. 60
  36. 90
  37. 210
  38. 200
  39. 71
  40. 21

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