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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 201 · 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 810 =
  2. 2.1% of 840 =
  3. 3.5% of 830 =
  4. 4.25% of 320 =
  5. 5.15% of 80 =
  6. 6.5% of 240 =
  7. 7.25% of 230 =
  8. 8.10% of 820 =
  9. 9.20% of 570 =
  10. 10.15% of 240 =
  11. 11.5% of 790 =
  12. 12.25% of 430 =
  13. 13.1% of 270 =
  14. 14.25% of 450 =
  15. 15.25% of 650 =
  16. 16.5% of 370 =
  17. 17.20% of 340 =
  18. 18.15% of 110 =
  19. 19.15% of 100 =
  20. 20.1% of 100 =
  21. 21.50% of 780 =
  22. 22.50% of 400 =
  23. 23.20% of 180 =
  24. 24.5% of 80 =
  25. 25.50% of 420 =
  26. 26.15% of 500 =
  27. 27.50% of 880 =
  28. 28.10% of 470 =
  29. 29.1% of 50 =
  30. 30.50% of 490 =
  31. 31.10% of 200 =
  32. 32.10% of 100 =
  33. 33.50% of 80 =
  34. 34.5% of 500 =
  35. 35.50% of 170 =
  36. 36.20% of 150 =
  37. 37.15% of 360 =
  38. 38.15% of 540 =
  39. 39.20% of 560 =
  40. 40.20% of 160 =

Answer key

  1. 81
  2. 8.4
  3. 41.5
  4. 80
  5. 12
  6. 12
  7. 57.5
  8. 82
  9. 114
  10. 36
  11. 39.5
  12. 107.5
  13. 2.7
  14. 112.5
  15. 162.5
  16. 18.5
  17. 68
  18. 16.5
  19. 15
  20. 1
  21. 390
  22. 200
  23. 36
  24. 4
  25. 210
  26. 75
  27. 440
  28. 47
  29. 0.5
  30. 245
  31. 20
  32. 10
  33. 40
  34. 25
  35. 85
  36. 30
  37. 54
  38. 81
  39. 112
  40. 32

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