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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 519 · 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 310 =
  2. 2.5% of 830 =
  3. 3.5% of 530 =
  4. 4.5% of 250 =
  5. 5.20% of 690 =
  6. 6.50% of 270 =
  7. 7.25% of 270 =
  8. 8.10% of 130 =
  9. 9.20% of 40 =
  10. 10.1% of 90 =
  11. 11.10% of 750 =
  12. 12.10% of 210 =
  13. 13.15% of 210 =
  14. 14.15% of 120 =
  15. 15.5% of 860 =
  16. 16.1% of 160 =
  17. 17.10% of 30 =
  18. 18.15% of 650 =
  19. 19.5% of 30 =
  20. 20.5% of 290 =
  21. 21.5% of 40 =
  22. 22.50% of 230 =
  23. 23.20% of 850 =
  24. 24.25% of 390 =
  25. 25.1% of 60 =
  26. 26.25% of 210 =
  27. 27.15% of 640 =
  28. 28.25% of 20 =
  29. 29.20% of 620 =
  30. 30.10% of 250 =
  31. 31.10% of 150 =
  32. 32.50% of 510 =
  33. 33.15% of 60 =
  34. 34.50% of 700 =
  35. 35.15% of 570 =
  36. 36.50% of 560 =
  37. 37.20% of 160 =
  38. 38.50% of 570 =
  39. 39.50% of 130 =
  40. 40.15% of 560 =

Answer key

  1. 31
  2. 41.5
  3. 26.5
  4. 12.5
  5. 138
  6. 135
  7. 67.5
  8. 13
  9. 8
  10. 0.9
  11. 75
  12. 21
  13. 31.5
  14. 18
  15. 43
  16. 1.6
  17. 3
  18. 97.5
  19. 1.5
  20. 14.5
  21. 2
  22. 115
  23. 170
  24. 97.5
  25. 0.6
  26. 52.5
  27. 96
  28. 5
  29. 124
  30. 25
  31. 15
  32. 255
  33. 9
  34. 350
  35. 85.5
  36. 280
  37. 32
  38. 285
  39. 65
  40. 84

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