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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 136 · 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. 1.20% of 60 =
  2. 2.50% of 150 =
  3. 3.25% of 80 =
  4. 4.20% of 600 =
  5. 5.5% of 130 =
  6. 6.50% of 630 =
  7. 7.20% of 900 =
  8. 8.20% of 700 =
  9. 9.1% of 840 =
  10. 10.25% of 570 =
  11. 11.1% of 860 =
  12. 12.20% of 390 =
  13. 13.25% of 640 =
  14. 14.25% of 410 =
  15. 15.50% of 810 =
  16. 16.50% of 130 =
  17. 17.15% of 290 =
  18. 18.20% of 470 =
  19. 19.1% of 670 =
  20. 20.20% of 70 =
  21. 21.5% of 450 =
  22. 22.25% of 460 =
  23. 23.1% of 100 =
  24. 24.1% of 250 =
  25. 25.25% of 250 =
  26. 26.1% of 30 =
  27. 27.20% of 530 =
  28. 28.25% of 750 =
  29. 29.5% of 570 =
  30. 30.25% of 330 =
  31. 31.15% of 800 =
  32. 32.10% of 510 =
  33. 33.1% of 170 =
  34. 34.10% of 560 =
  35. 35.10% of 320 =
  36. 36.25% of 640 =
  37. 37.5% of 560 =
  38. 38.20% of 170 =
  39. 39.1% of 540 =
  40. 40.1% of 570 =

Answer key

  1. 12
  2. 75
  3. 20
  4. 120
  5. 6.5
  6. 315
  7. 180
  8. 140
  9. 8.4
  10. 142.5
  11. 8.6
  12. 78
  13. 160
  14. 102.5
  15. 405
  16. 65
  17. 43.5
  18. 94
  19. 6.7
  20. 14
  21. 22.5
  22. 115
  23. 1
  24. 2.5
  25. 62.5
  26. 0.3
  27. 106
  28. 187.5
  29. 28.5
  30. 82.5
  31. 120
  32. 51
  33. 1.7
  34. 56
  35. 32
  36. 160
  37. 28
  38. 34
  39. 5.4
  40. 5.7

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