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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 404 · 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. 1.1% of 520 =
  2. 2.10% of 810 =
  3. 3.5% of 420 =
  4. 4.25% of 250 =
  5. 5.20% of 840 =
  6. 6.20% of 880 =
  7. 7.15% of 190 =
  8. 8.1% of 890 =
  9. 9.20% of 520 =
  10. 10.10% of 560 =
  11. 11.20% of 650 =
  12. 12.1% of 30 =
  13. 13.25% of 30 =
  14. 14.15% of 560 =
  15. 15.10% of 530 =
  16. 16.25% of 20 =
  17. 17.15% of 390 =
  18. 18.10% of 280 =
  19. 19.15% of 250 =
  20. 20.5% of 270 =
  21. 21.15% of 240 =
  22. 22.25% of 480 =
  23. 23.50% of 280 =
  24. 24.50% of 330 =
  25. 25.5% of 350 =
  26. 26.5% of 200 =
  27. 27.25% of 50 =
  28. 28.50% of 440 =
  29. 29.5% of 690 =
  30. 30.15% of 840 =
  31. 31.5% of 790 =
  32. 32.10% of 650 =
  33. 33.50% of 390 =
  34. 34.50% of 810 =
  35. 35.5% of 870 =
  36. 36.10% of 650 =
  37. 37.50% of 160 =
  38. 38.25% of 260 =
  39. 39.15% of 720 =
  40. 40.50% of 200 =

Answer key

  1. 5.2
  2. 81
  3. 21
  4. 62.5
  5. 168
  6. 176
  7. 28.5
  8. 8.9
  9. 104
  10. 56
  11. 130
  12. 0.3
  13. 7.5
  14. 84
  15. 53
  16. 5
  17. 58.5
  18. 28
  19. 37.5
  20. 13.5
  21. 36
  22. 120
  23. 140
  24. 165
  25. 17.5
  26. 10
  27. 12.5
  28. 220
  29. 34.5
  30. 126
  31. 39.5
  32. 65
  33. 195
  34. 405
  35. 43.5
  36. 65
  37. 80
  38. 65
  39. 108
  40. 100

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