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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 542 · 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 900 =
  2. 2.20% of 640 =
  3. 3.50% of 100 =
  4. 4.1% of 70 =
  5. 5.10% of 440 =
  6. 6.50% of 100 =
  7. 7.5% of 90 =
  8. 8.10% of 790 =
  9. 9.50% of 190 =
  10. 10.20% of 650 =
  11. 11.10% of 870 =
  12. 12.5% of 580 =
  13. 13.15% of 740 =
  14. 14.10% of 360 =
  15. 15.10% of 80 =
  16. 16.5% of 480 =
  17. 17.10% of 30 =
  18. 18.10% of 150 =
  19. 19.5% of 180 =
  20. 20.10% of 300 =
  21. 21.10% of 600 =
  22. 22.5% of 400 =
  23. 23.25% of 880 =
  24. 24.5% of 480 =
  25. 25.50% of 840 =
  26. 26.10% of 290 =
  27. 27.25% of 170 =
  28. 28.1% of 520 =
  29. 29.25% of 390 =
  30. 30.50% of 870 =
  31. 31.5% of 580 =
  32. 32.50% of 330 =
  33. 33.1% of 610 =
  34. 34.50% of 570 =
  35. 35.15% of 260 =
  36. 36.15% of 20 =
  37. 37.10% of 830 =
  38. 38.5% of 440 =
  39. 39.50% of 460 =
  40. 40.10% of 760 =

Answer key

  1. 45
  2. 128
  3. 50
  4. 0.7
  5. 44
  6. 50
  7. 4.5
  8. 79
  9. 95
  10. 130
  11. 87
  12. 29
  13. 111
  14. 36
  15. 8
  16. 24
  17. 3
  18. 15
  19. 9
  20. 30
  21. 60
  22. 20
  23. 220
  24. 24
  25. 420
  26. 29
  27. 42.5
  28. 5.2
  29. 97.5
  30. 435
  31. 29
  32. 165
  33. 6.1
  34. 285
  35. 39
  36. 3
  37. 83
  38. 22
  39. 230
  40. 76

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