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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 393 · 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 170 =
  2. 2.1% of 520 =
  3. 3.50% of 840 =
  4. 4.20% of 840 =
  5. 5.20% of 740 =
  6. 6.10% of 20 =
  7. 7.25% of 130 =
  8. 8.5% of 60 =
  9. 9.15% of 410 =
  10. 10.10% of 500 =
  11. 11.25% of 270 =
  12. 12.15% of 650 =
  13. 13.10% of 570 =
  14. 14.1% of 520 =
  15. 15.1% of 510 =
  16. 16.25% of 40 =
  17. 17.10% of 100 =
  18. 18.20% of 790 =
  19. 19.20% of 870 =
  20. 20.25% of 820 =
  21. 21.20% of 120 =
  22. 22.10% of 60 =
  23. 23.20% of 450 =
  24. 24.10% of 450 =
  25. 25.15% of 440 =
  26. 26.5% of 90 =
  27. 27.15% of 310 =
  28. 28.25% of 530 =
  29. 29.50% of 800 =
  30. 30.20% of 190 =
  31. 31.10% of 230 =
  32. 32.25% of 60 =
  33. 33.5% of 50 =
  34. 34.1% of 360 =
  35. 35.10% of 140 =
  36. 36.10% of 560 =
  37. 37.25% of 600 =
  38. 38.15% of 300 =
  39. 39.1% of 200 =
  40. 40.50% of 740 =

Answer key

  1. 1.7
  2. 5.2
  3. 420
  4. 168
  5. 148
  6. 2
  7. 32.5
  8. 3
  9. 61.5
  10. 50
  11. 67.5
  12. 97.5
  13. 57
  14. 5.2
  15. 5.1
  16. 10
  17. 10
  18. 158
  19. 174
  20. 205
  21. 24
  22. 6
  23. 90
  24. 45
  25. 66
  26. 4.5
  27. 46.5
  28. 132.5
  29. 400
  30. 38
  31. 23
  32. 15
  33. 2.5
  34. 3.6
  35. 14
  36. 56
  37. 150
  38. 45
  39. 2
  40. 370

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