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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 544 · 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. 1.1% of 90 =
  2. 2.1% of 280 =
  3. 3.25% of 400 =
  4. 4.1% of 710 =
  5. 5.5% of 300 =
  6. 6.1% of 80 =
  7. 7.1% of 760 =
  8. 8.50% of 870 =
  9. 9.5% of 90 =
  10. 10.20% of 120 =
  11. 11.15% of 240 =
  12. 12.10% of 710 =
  13. 13.20% of 720 =
  14. 14.25% of 300 =
  15. 15.20% of 830 =
  16. 16.50% of 250 =
  17. 17.5% of 120 =
  18. 18.5% of 140 =
  19. 19.25% of 310 =
  20. 20.20% of 450 =
  21. 21.50% of 750 =
  22. 22.25% of 700 =
  23. 23.15% of 550 =
  24. 24.50% of 790 =
  25. 25.15% of 250 =
  26. 26.50% of 550 =
  27. 27.25% of 160 =
  28. 28.25% of 500 =
  29. 29.10% of 150 =
  30. 30.10% of 480 =
  31. 31.10% of 270 =
  32. 32.10% of 490 =
  33. 33.25% of 840 =
  34. 34.25% of 60 =
  35. 35.50% of 20 =
  36. 36.10% of 590 =
  37. 37.50% of 200 =
  38. 38.1% of 120 =
  39. 39.5% of 880 =
  40. 40.1% of 250 =

Answer key

  1. 0.9
  2. 2.8
  3. 100
  4. 7.1
  5. 15
  6. 0.8
  7. 7.6
  8. 435
  9. 4.5
  10. 24
  11. 36
  12. 71
  13. 144
  14. 75
  15. 166
  16. 125
  17. 6
  18. 7
  19. 77.5
  20. 90
  21. 375
  22. 175
  23. 82.5
  24. 395
  25. 37.5
  26. 275
  27. 40
  28. 125
  29. 15
  30. 48
  31. 27
  32. 49
  33. 210
  34. 15
  35. 10
  36. 59
  37. 100
  38. 1.2
  39. 44
  40. 2.5

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