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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 91 · 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. 1.5% of 210 =
  2. 2.20% of 360 =
  3. 3.5% of 490 =
  4. 4.25% of 820 =
  5. 5.50% of 240 =
  6. 6.25% of 420 =
  7. 7.25% of 780 =
  8. 8.50% of 410 =
  9. 9.5% of 240 =
  10. 10.50% of 470 =
  11. 11.20% of 390 =
  12. 12.20% of 330 =
  13. 13.50% of 760 =
  14. 14.20% of 870 =
  15. 15.1% of 310 =
  16. 16.20% of 40 =
  17. 17.25% of 260 =
  18. 18.5% of 490 =
  19. 19.25% of 400 =
  20. 20.1% of 100 =
  21. 21.1% of 730 =
  22. 22.15% of 330 =
  23. 23.15% of 230 =
  24. 24.15% of 680 =
  25. 25.5% of 450 =
  26. 26.50% of 600 =
  27. 27.1% of 360 =
  28. 28.1% of 870 =
  29. 29.1% of 500 =
  30. 30.5% of 480 =
  31. 31.50% of 250 =
  32. 32.15% of 710 =
  33. 33.15% of 870 =
  34. 34.1% of 290 =
  35. 35.1% of 730 =
  36. 36.25% of 210 =
  37. 37.15% of 20 =
  38. 38.5% of 30 =
  39. 39.5% of 60 =
  40. 40.20% of 870 =

Answer key

  1. 10.5
  2. 72
  3. 24.5
  4. 205
  5. 120
  6. 105
  7. 195
  8. 205
  9. 12
  10. 235
  11. 78
  12. 66
  13. 380
  14. 174
  15. 3.1
  16. 8
  17. 65
  18. 24.5
  19. 100
  20. 1
  21. 7.3
  22. 49.5
  23. 34.5
  24. 102
  25. 22.5
  26. 300
  27. 3.6
  28. 8.7
  29. 5
  30. 24
  31. 125
  32. 106.5
  33. 130.5
  34. 2.9
  35. 7.3
  36. 52.5
  37. 3
  38. 1.5
  39. 3
  40. 174

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