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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 623 · 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. 1.25% of 530 =
  2. 2.5% of 530 =
  3. 3.15% of 160 =
  4. 4.15% of 460 =
  5. 5.1% of 810 =
  6. 6.1% of 290 =
  7. 7.15% of 180 =
  8. 8.20% of 120 =
  9. 9.1% of 180 =
  10. 10.50% of 160 =
  11. 11.1% of 520 =
  12. 12.10% of 850 =
  13. 13.25% of 100 =
  14. 14.5% of 480 =
  15. 15.1% of 870 =
  16. 16.50% of 240 =
  17. 17.10% of 330 =
  18. 18.50% of 530 =
  19. 19.10% of 710 =
  20. 20.1% of 150 =
  21. 21.25% of 520 =
  22. 22.15% of 760 =
  23. 23.10% of 130 =
  24. 24.20% of 330 =
  25. 25.20% of 110 =
  26. 26.25% of 600 =
  27. 27.1% of 60 =
  28. 28.5% of 720 =
  29. 29.1% of 270 =
  30. 30.5% of 80 =
  31. 31.15% of 770 =
  32. 32.25% of 680 =
  33. 33.10% of 160 =
  34. 34.10% of 690 =
  35. 35.10% of 500 =
  36. 36.15% of 890 =
  37. 37.15% of 390 =
  38. 38.10% of 860 =
  39. 39.25% of 630 =
  40. 40.20% of 750 =

Answer key

  1. 132.5
  2. 26.5
  3. 24
  4. 69
  5. 8.1
  6. 2.9
  7. 27
  8. 24
  9. 1.8
  10. 80
  11. 5.2
  12. 85
  13. 25
  14. 24
  15. 8.7
  16. 120
  17. 33
  18. 265
  19. 71
  20. 1.5
  21. 130
  22. 114
  23. 13
  24. 66
  25. 22
  26. 150
  27. 0.6
  28. 36
  29. 2.7
  30. 4
  31. 115.5
  32. 170
  33. 16
  34. 69
  35. 50
  36. 133.5
  37. 58.5
  38. 86
  39. 157.5
  40. 150

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