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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 300 · 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 590 =
  2. 2.10% of 60 =
  3. 3.20% of 480 =
  4. 4.1% of 880 =
  5. 5.15% of 50 =
  6. 6.50% of 390 =
  7. 7.20% of 260 =
  8. 8.15% of 150 =
  9. 9.20% of 510 =
  10. 10.5% of 800 =
  11. 11.15% of 360 =
  12. 12.1% of 80 =
  13. 13.25% of 250 =
  14. 14.50% of 770 =
  15. 15.15% of 660 =
  16. 16.10% of 220 =
  17. 17.1% of 650 =
  18. 18.5% of 60 =
  19. 19.25% of 470 =
  20. 20.25% of 480 =
  21. 21.50% of 600 =
  22. 22.20% of 870 =
  23. 23.15% of 270 =
  24. 24.50% of 440 =
  25. 25.25% of 360 =
  26. 26.15% of 860 =
  27. 27.10% of 390 =
  28. 28.5% of 190 =
  29. 29.20% of 50 =
  30. 30.5% of 160 =
  31. 31.10% of 890 =
  32. 32.15% of 380 =
  33. 33.15% of 870 =
  34. 34.1% of 700 =
  35. 35.25% of 810 =
  36. 36.5% of 420 =
  37. 37.15% of 230 =
  38. 38.5% of 310 =
  39. 39.50% of 50 =
  40. 40.25% of 230 =

Answer key

  1. 88.5
  2. 6
  3. 96
  4. 8.8
  5. 7.5
  6. 195
  7. 52
  8. 22.5
  9. 102
  10. 40
  11. 54
  12. 0.8
  13. 62.5
  14. 385
  15. 99
  16. 22
  17. 6.5
  18. 3
  19. 117.5
  20. 120
  21. 300
  22. 174
  23. 40.5
  24. 220
  25. 90
  26. 129
  27. 39
  28. 9.5
  29. 10
  30. 8
  31. 89
  32. 57
  33. 130.5
  34. 7
  35. 202.5
  36. 21
  37. 34.5
  38. 15.5
  39. 25
  40. 57.5

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