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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 106 · 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 220 =
  2. 2.50% of 680 =
  3. 3.25% of 590 =
  4. 4.5% of 390 =
  5. 5.50% of 490 =
  6. 6.25% of 400 =
  7. 7.50% of 650 =
  8. 8.10% of 600 =
  9. 9.50% of 170 =
  10. 10.25% of 880 =
  11. 11.10% of 20 =
  12. 12.25% of 580 =
  13. 13.10% of 780 =
  14. 14.25% of 170 =
  15. 15.25% of 330 =
  16. 16.50% of 890 =
  17. 17.1% of 440 =
  18. 18.50% of 170 =
  19. 19.5% of 430 =
  20. 20.5% of 140 =
  21. 21.10% of 380 =
  22. 22.1% of 40 =
  23. 23.20% of 770 =
  24. 24.5% of 90 =
  25. 25.20% of 500 =
  26. 26.15% of 600 =
  27. 27.15% of 50 =
  28. 28.10% of 520 =
  29. 29.5% of 250 =
  30. 30.25% of 420 =
  31. 31.10% of 530 =
  32. 32.10% of 510 =
  33. 33.50% of 160 =
  34. 34.5% of 660 =
  35. 35.5% of 850 =
  36. 36.5% of 140 =
  37. 37.10% of 570 =
  38. 38.20% of 350 =
  39. 39.15% of 190 =
  40. 40.10% of 460 =

Answer key

  1. 11
  2. 340
  3. 147.5
  4. 19.5
  5. 245
  6. 100
  7. 325
  8. 60
  9. 85
  10. 220
  11. 2
  12. 145
  13. 78
  14. 42.5
  15. 82.5
  16. 445
  17. 4.4
  18. 85
  19. 21.5
  20. 7
  21. 38
  22. 0.4
  23. 154
  24. 4.5
  25. 100
  26. 90
  27. 7.5
  28. 52
  29. 12.5
  30. 105
  31. 53
  32. 51
  33. 80
  34. 33
  35. 42.5
  36. 7
  37. 57
  38. 70
  39. 28.5
  40. 46

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