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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 344 · 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 140 =
  2. 2.25% of 510 =
  3. 3.5% of 540 =
  4. 4.20% of 320 =
  5. 5.10% of 650 =
  6. 6.50% of 90 =
  7. 7.5% of 30 =
  8. 8.1% of 380 =
  9. 9.15% of 160 =
  10. 10.20% of 450 =
  11. 11.20% of 620 =
  12. 12.5% of 60 =
  13. 13.1% of 30 =
  14. 14.5% of 730 =
  15. 15.5% of 900 =
  16. 16.50% of 660 =
  17. 17.10% of 310 =
  18. 18.1% of 680 =
  19. 19.25% of 160 =
  20. 20.50% of 890 =
  21. 21.25% of 810 =
  22. 22.25% of 420 =
  23. 23.10% of 510 =
  24. 24.25% of 610 =
  25. 25.20% of 140 =
  26. 26.10% of 760 =
  27. 27.15% of 860 =
  28. 28.15% of 240 =
  29. 29.20% of 400 =
  30. 30.20% of 800 =
  31. 31.15% of 620 =
  32. 32.15% of 60 =
  33. 33.50% of 510 =
  34. 34.15% of 260 =
  35. 35.20% of 610 =
  36. 36.25% of 630 =
  37. 37.5% of 350 =
  38. 38.50% of 430 =
  39. 39.15% of 70 =
  40. 40.50% of 130 =

Answer key

  1. 7
  2. 127.5
  3. 27
  4. 64
  5. 65
  6. 45
  7. 1.5
  8. 3.8
  9. 24
  10. 90
  11. 124
  12. 3
  13. 0.3
  14. 36.5
  15. 45
  16. 330
  17. 31
  18. 6.8
  19. 40
  20. 445
  21. 202.5
  22. 105
  23. 51
  24. 152.5
  25. 28
  26. 76
  27. 129
  28. 36
  29. 80
  30. 160
  31. 93
  32. 9
  33. 255
  34. 39
  35. 122
  36. 157.5
  37. 17.5
  38. 215
  39. 10.5
  40. 65

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