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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 423 · 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 170 =
  2. 2.25% of 790 =
  3. 3.15% of 70 =
  4. 4.15% of 740 =
  5. 5.25% of 90 =
  6. 6.10% of 120 =
  7. 7.15% of 240 =
  8. 8.10% of 470 =
  9. 9.1% of 510 =
  10. 10.5% of 360 =
  11. 11.5% of 140 =
  12. 12.20% of 440 =
  13. 13.10% of 620 =
  14. 14.10% of 330 =
  15. 15.10% of 430 =
  16. 16.50% of 820 =
  17. 17.5% of 110 =
  18. 18.10% of 790 =
  19. 19.10% of 740 =
  20. 20.1% of 410 =
  21. 21.10% of 180 =
  22. 22.15% of 680 =
  23. 23.5% of 410 =
  24. 24.20% of 210 =
  25. 25.15% of 230 =
  26. 26.50% of 470 =
  27. 27.5% of 300 =
  28. 28.1% of 800 =
  29. 29.20% of 480 =
  30. 30.25% of 700 =
  31. 31.25% of 850 =
  32. 32.50% of 340 =
  33. 33.15% of 590 =
  34. 34.1% of 100 =
  35. 35.15% of 380 =
  36. 36.1% of 270 =
  37. 37.15% of 200 =
  38. 38.1% of 210 =
  39. 39.5% of 200 =
  40. 40.20% of 510 =

Answer key

  1. 34
  2. 197.5
  3. 10.5
  4. 111
  5. 22.5
  6. 12
  7. 36
  8. 47
  9. 5.1
  10. 18
  11. 7
  12. 88
  13. 62
  14. 33
  15. 43
  16. 410
  17. 5.5
  18. 79
  19. 74
  20. 4.1
  21. 18
  22. 102
  23. 20.5
  24. 42
  25. 34.5
  26. 235
  27. 15
  28. 8
  29. 96
  30. 175
  31. 212.5
  32. 170
  33. 88.5
  34. 1
  35. 57
  36. 2.7
  37. 30
  38. 2.1
  39. 10
  40. 102

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