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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 28 · 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. 1.10% of 440 =
  2. 2.50% of 770 =
  3. 3.10% of 150 =
  4. 4.1% of 680 =
  5. 5.25% of 410 =
  6. 6.5% of 580 =
  7. 7.15% of 710 =
  8. 8.5% of 840 =
  9. 9.5% of 440 =
  10. 10.10% of 810 =
  11. 11.50% of 250 =
  12. 12.50% of 160 =
  13. 13.1% of 750 =
  14. 14.25% of 230 =
  15. 15.50% of 530 =
  16. 16.50% of 630 =
  17. 17.25% of 540 =
  18. 18.1% of 50 =
  19. 19.20% of 190 =
  20. 20.20% of 110 =
  21. 21.25% of 850 =
  22. 22.10% of 740 =
  23. 23.10% of 830 =
  24. 24.10% of 290 =
  25. 25.5% of 340 =
  26. 26.25% of 150 =
  27. 27.5% of 560 =
  28. 28.10% of 240 =
  29. 29.10% of 580 =
  30. 30.5% of 790 =
  31. 31.50% of 450 =
  32. 32.10% of 730 =
  33. 33.20% of 660 =
  34. 34.25% of 710 =
  35. 35.15% of 200 =
  36. 36.5% of 800 =
  37. 37.20% of 70 =
  38. 38.1% of 760 =
  39. 39.5% of 310 =
  40. 40.5% of 170 =

Answer key

  1. 44
  2. 385
  3. 15
  4. 6.8
  5. 102.5
  6. 29
  7. 106.5
  8. 42
  9. 22
  10. 81
  11. 125
  12. 80
  13. 7.5
  14. 57.5
  15. 265
  16. 315
  17. 135
  18. 0.5
  19. 38
  20. 22
  21. 212.5
  22. 74
  23. 83
  24. 29
  25. 17
  26. 37.5
  27. 28
  28. 24
  29. 58
  30. 39.5
  31. 225
  32. 73
  33. 132
  34. 177.5
  35. 30
  36. 40
  37. 14
  38. 7.6
  39. 15.5
  40. 8.5

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