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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 432 · 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. 1.20% of 210 =
  2. 2.25% of 530 =
  3. 3.25% of 170 =
  4. 4.50% of 240 =
  5. 5.1% of 840 =
  6. 6.5% of 70 =
  7. 7.15% of 190 =
  8. 8.5% of 620 =
  9. 9.20% of 780 =
  10. 10.20% of 420 =
  11. 11.20% of 340 =
  12. 12.1% of 140 =
  13. 13.1% of 200 =
  14. 14.10% of 660 =
  15. 15.25% of 530 =
  16. 16.15% of 60 =
  17. 17.5% of 830 =
  18. 18.15% of 450 =
  19. 19.15% of 430 =
  20. 20.50% of 70 =
  21. 21.20% of 660 =
  22. 22.5% of 670 =
  23. 23.25% of 220 =
  24. 24.5% of 450 =
  25. 25.5% of 880 =
  26. 26.5% of 690 =
  27. 27.15% of 560 =
  28. 28.15% of 130 =
  29. 29.15% of 480 =
  30. 30.15% of 310 =
  31. 31.25% of 180 =
  32. 32.15% of 400 =
  33. 33.5% of 150 =
  34. 34.10% of 420 =
  35. 35.25% of 160 =
  36. 36.15% of 60 =
  37. 37.5% of 890 =
  38. 38.1% of 680 =
  39. 39.25% of 400 =
  40. 40.5% of 390 =

Answer key

  1. 42
  2. 132.5
  3. 42.5
  4. 120
  5. 8.4
  6. 3.5
  7. 28.5
  8. 31
  9. 156
  10. 84
  11. 68
  12. 1.4
  13. 2
  14. 66
  15. 132.5
  16. 9
  17. 41.5
  18. 67.5
  19. 64.5
  20. 35
  21. 132
  22. 33.5
  23. 55
  24. 22.5
  25. 44
  26. 34.5
  27. 84
  28. 19.5
  29. 72
  30. 46.5
  31. 45
  32. 60
  33. 7.5
  34. 42
  35. 40
  36. 9
  37. 44.5
  38. 6.8
  39. 100
  40. 19.5

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