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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 529 · 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. 1.10% of 820 =
  2. 2.20% of 260 =
  3. 3.20% of 200 =
  4. 4.25% of 490 =
  5. 5.10% of 150 =
  6. 6.25% of 390 =
  7. 7.10% of 440 =
  8. 8.50% of 540 =
  9. 9.15% of 270 =
  10. 10.10% of 670 =
  11. 11.1% of 160 =
  12. 12.20% of 190 =
  13. 13.5% of 440 =
  14. 14.50% of 80 =
  15. 15.1% of 70 =
  16. 16.25% of 200 =
  17. 17.50% of 560 =
  18. 18.10% of 250 =
  19. 19.15% of 810 =
  20. 20.5% of 100 =
  21. 21.1% of 50 =
  22. 22.15% of 490 =
  23. 23.20% of 790 =
  24. 24.5% of 530 =
  25. 25.1% of 260 =
  26. 26.20% of 540 =
  27. 27.25% of 460 =
  28. 28.50% of 620 =
  29. 29.15% of 680 =
  30. 30.1% of 120 =
  31. 31.5% of 460 =
  32. 32.15% of 730 =
  33. 33.1% of 150 =
  34. 34.20% of 680 =
  35. 35.5% of 310 =
  36. 36.50% of 460 =
  37. 37.20% of 460 =
  38. 38.10% of 190 =
  39. 39.1% of 240 =
  40. 40.50% of 580 =

Answer key

  1. 82
  2. 52
  3. 40
  4. 122.5
  5. 15
  6. 97.5
  7. 44
  8. 270
  9. 40.5
  10. 67
  11. 1.6
  12. 38
  13. 22
  14. 40
  15. 0.7
  16. 50
  17. 280
  18. 25
  19. 121.5
  20. 5
  21. 0.5
  22. 73.5
  23. 158
  24. 26.5
  25. 2.6
  26. 108
  27. 115
  28. 310
  29. 102
  30. 1.2
  31. 23
  32. 109.5
  33. 1.5
  34. 136
  35. 15.5
  36. 230
  37. 92
  38. 19
  39. 2.4
  40. 290

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