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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 666 · 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. 1.25% of 190 =
  2. 2.1% of 610 =
  3. 3.10% of 750 =
  4. 4.25% of 640 =
  5. 5.20% of 140 =
  6. 6.50% of 820 =
  7. 7.10% of 180 =
  8. 8.5% of 740 =
  9. 9.15% of 170 =
  10. 10.5% of 770 =
  11. 11.15% of 240 =
  12. 12.15% of 420 =
  13. 13.5% of 230 =
  14. 14.1% of 520 =
  15. 15.10% of 120 =
  16. 16.15% of 440 =
  17. 17.5% of 400 =
  18. 18.15% of 20 =
  19. 19.10% of 150 =
  20. 20.1% of 650 =
  21. 21.10% of 460 =
  22. 22.10% of 20 =
  23. 23.25% of 80 =
  24. 24.20% of 260 =
  25. 25.50% of 650 =
  26. 26.50% of 520 =
  27. 27.5% of 220 =
  28. 28.25% of 810 =
  29. 29.10% of 880 =
  30. 30.50% of 880 =
  31. 31.1% of 810 =
  32. 32.1% of 770 =
  33. 33.50% of 730 =
  34. 34.25% of 440 =
  35. 35.25% of 380 =
  36. 36.15% of 400 =
  37. 37.25% of 870 =
  38. 38.25% of 700 =
  39. 39.15% of 220 =
  40. 40.15% of 180 =

Answer key

  1. 47.5
  2. 6.1
  3. 75
  4. 160
  5. 28
  6. 410
  7. 18
  8. 37
  9. 25.5
  10. 38.5
  11. 36
  12. 63
  13. 11.5
  14. 5.2
  15. 12
  16. 66
  17. 20
  18. 3
  19. 15
  20. 6.5
  21. 46
  22. 2
  23. 20
  24. 52
  25. 325
  26. 260
  27. 11
  28. 202.5
  29. 88
  30. 440
  31. 8.1
  32. 7.7
  33. 365
  34. 110
  35. 95
  36. 60
  37. 217.5
  38. 175
  39. 33
  40. 27

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