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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 224 · 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 550 =
  2. 2.5% of 310 =
  3. 3.1% of 780 =
  4. 4.5% of 360 =
  5. 5.25% of 710 =
  6. 6.25% of 340 =
  7. 7.25% of 610 =
  8. 8.25% of 30 =
  9. 9.5% of 60 =
  10. 10.50% of 690 =
  11. 11.20% of 710 =
  12. 12.1% of 120 =
  13. 13.5% of 710 =
  14. 14.15% of 350 =
  15. 15.5% of 680 =
  16. 16.25% of 230 =
  17. 17.25% of 340 =
  18. 18.1% of 750 =
  19. 19.25% of 290 =
  20. 20.20% of 650 =
  21. 21.50% of 840 =
  22. 22.1% of 520 =
  23. 23.50% of 670 =
  24. 24.50% of 30 =
  25. 25.25% of 90 =
  26. 26.15% of 290 =
  27. 27.15% of 620 =
  28. 28.10% of 250 =
  29. 29.25% of 90 =
  30. 30.50% of 810 =
  31. 31.20% of 490 =
  32. 32.1% of 430 =
  33. 33.10% of 300 =
  34. 34.5% of 300 =
  35. 35.25% of 440 =
  36. 36.25% of 570 =
  37. 37.15% of 350 =
  38. 38.1% of 880 =
  39. 39.15% of 130 =
  40. 40.1% of 120 =

Answer key

  1. 5.5
  2. 15.5
  3. 7.8
  4. 18
  5. 177.5
  6. 85
  7. 152.5
  8. 7.5
  9. 3
  10. 345
  11. 142
  12. 1.2
  13. 35.5
  14. 52.5
  15. 34
  16. 57.5
  17. 85
  18. 7.5
  19. 72.5
  20. 130
  21. 420
  22. 5.2
  23. 335
  24. 15
  25. 22.5
  26. 43.5
  27. 93
  28. 25
  29. 22.5
  30. 405
  31. 98
  32. 4.3
  33. 30
  34. 15
  35. 110
  36. 142.5
  37. 52.5
  38. 8.8
  39. 19.5
  40. 1.2

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