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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 373 · 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 560 =
  2. 2.1% of 680 =
  3. 3.25% of 620 =
  4. 4.15% of 850 =
  5. 5.10% of 750 =
  6. 6.50% of 610 =
  7. 7.15% of 660 =
  8. 8.1% of 80 =
  9. 9.10% of 60 =
  10. 10.10% of 510 =
  11. 11.10% of 830 =
  12. 12.50% of 470 =
  13. 13.15% of 730 =
  14. 14.10% of 240 =
  15. 15.50% of 200 =
  16. 16.5% of 840 =
  17. 17.5% of 170 =
  18. 18.10% of 190 =
  19. 19.1% of 70 =
  20. 20.25% of 310 =
  21. 21.25% of 460 =
  22. 22.50% of 710 =
  23. 23.10% of 250 =
  24. 24.1% of 680 =
  25. 25.20% of 900 =
  26. 26.15% of 180 =
  27. 27.20% of 730 =
  28. 28.1% of 140 =
  29. 29.10% of 240 =
  30. 30.15% of 170 =
  31. 31.50% of 450 =
  32. 32.15% of 600 =
  33. 33.10% of 220 =
  34. 34.5% of 220 =
  35. 35.1% of 70 =
  36. 36.5% of 540 =
  37. 37.5% of 690 =
  38. 38.20% of 60 =
  39. 39.20% of 450 =
  40. 40.1% of 830 =

Answer key

  1. 28
  2. 6.8
  3. 155
  4. 127.5
  5. 75
  6. 305
  7. 99
  8. 0.8
  9. 6
  10. 51
  11. 83
  12. 235
  13. 109.5
  14. 24
  15. 100
  16. 42
  17. 8.5
  18. 19
  19. 0.7
  20. 77.5
  21. 115
  22. 355
  23. 25
  24. 6.8
  25. 180
  26. 27
  27. 146
  28. 1.4
  29. 24
  30. 25.5
  31. 225
  32. 90
  33. 22
  34. 11
  35. 0.7
  36. 27
  37. 34.5
  38. 12
  39. 90
  40. 8.3

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