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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 401 · 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 630 =
  2. 2.10% of 370 =
  3. 3.25% of 760 =
  4. 4.5% of 40 =
  5. 5.15% of 140 =
  6. 6.15% of 880 =
  7. 7.1% of 540 =
  8. 8.1% of 460 =
  9. 9.25% of 720 =
  10. 10.5% of 650 =
  11. 11.50% of 280 =
  12. 12.10% of 680 =
  13. 13.20% of 40 =
  14. 14.50% of 300 =
  15. 15.25% of 700 =
  16. 16.5% of 610 =
  17. 17.1% of 900 =
  18. 18.5% of 490 =
  19. 19.20% of 560 =
  20. 20.1% of 260 =
  21. 21.1% of 680 =
  22. 22.50% of 430 =
  23. 23.1% of 780 =
  24. 24.50% of 420 =
  25. 25.50% of 370 =
  26. 26.5% of 450 =
  27. 27.15% of 680 =
  28. 28.10% of 140 =
  29. 29.5% of 670 =
  30. 30.10% of 130 =
  31. 31.15% of 740 =
  32. 32.1% of 460 =
  33. 33.1% of 810 =
  34. 34.1% of 310 =
  35. 35.20% of 750 =
  36. 36.20% of 440 =
  37. 37.1% of 240 =
  38. 38.10% of 200 =
  39. 39.10% of 140 =
  40. 40.15% of 140 =

Answer key

  1. 6.3
  2. 37
  3. 190
  4. 2
  5. 21
  6. 132
  7. 5.4
  8. 4.6
  9. 180
  10. 32.5
  11. 140
  12. 68
  13. 8
  14. 150
  15. 175
  16. 30.5
  17. 9
  18. 24.5
  19. 112
  20. 2.6
  21. 6.8
  22. 215
  23. 7.8
  24. 210
  25. 185
  26. 22.5
  27. 102
  28. 14
  29. 33.5
  30. 13
  31. 111
  32. 4.6
  33. 8.1
  34. 3.1
  35. 150
  36. 88
  37. 2.4
  38. 20
  39. 14
  40. 21

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