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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 175 · 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. 1.15% of 170 =
  2. 2.10% of 780 =
  3. 3.25% of 450 =
  4. 4.50% of 250 =
  5. 5.5% of 850 =
  6. 6.1% of 340 =
  7. 7.20% of 680 =
  8. 8.15% of 350 =
  9. 9.15% of 670 =
  10. 10.15% of 790 =
  11. 11.20% of 620 =
  12. 12.5% of 470 =
  13. 13.20% of 150 =
  14. 14.5% of 540 =
  15. 15.10% of 190 =
  16. 16.1% of 370 =
  17. 17.50% of 470 =
  18. 18.1% of 610 =
  19. 19.15% of 180 =
  20. 20.15% of 340 =
  21. 21.25% of 50 =
  22. 22.5% of 610 =
  23. 23.20% of 740 =
  24. 24.25% of 240 =
  25. 25.25% of 720 =
  26. 26.50% of 340 =
  27. 27.10% of 880 =
  28. 28.50% of 490 =
  29. 29.10% of 270 =
  30. 30.1% of 620 =
  31. 31.15% of 860 =
  32. 32.5% of 530 =
  33. 33.50% of 120 =
  34. 34.15% of 830 =
  35. 35.50% of 830 =
  36. 36.15% of 360 =
  37. 37.15% of 530 =
  38. 38.5% of 800 =
  39. 39.20% of 100 =
  40. 40.25% of 530 =

Answer key

  1. 25.5
  2. 78
  3. 112.5
  4. 125
  5. 42.5
  6. 3.4
  7. 136
  8. 52.5
  9. 100.5
  10. 118.5
  11. 124
  12. 23.5
  13. 30
  14. 27
  15. 19
  16. 3.7
  17. 235
  18. 6.1
  19. 27
  20. 51
  21. 12.5
  22. 30.5
  23. 148
  24. 60
  25. 180
  26. 170
  27. 88
  28. 245
  29. 27
  30. 6.2
  31. 129
  32. 26.5
  33. 60
  34. 124.5
  35. 415
  36. 54
  37. 79.5
  38. 40
  39. 20
  40. 132.5

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