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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 386 · 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. 1.50% of 430 =
  2. 2.1% of 600 =
  3. 3.20% of 510 =
  4. 4.25% of 770 =
  5. 5.5% of 210 =
  6. 6.20% of 430 =
  7. 7.10% of 850 =
  8. 8.25% of 900 =
  9. 9.25% of 550 =
  10. 10.50% of 680 =
  11. 11.50% of 800 =
  12. 12.5% of 120 =
  13. 13.15% of 60 =
  14. 14.10% of 850 =
  15. 15.20% of 250 =
  16. 16.20% of 110 =
  17. 17.20% of 160 =
  18. 18.5% of 50 =
  19. 19.20% of 20 =
  20. 20.20% of 130 =
  21. 21.1% of 390 =
  22. 22.10% of 420 =
  23. 23.5% of 900 =
  24. 24.20% of 870 =
  25. 25.5% of 190 =
  26. 26.10% of 510 =
  27. 27.20% of 90 =
  28. 28.1% of 140 =
  29. 29.1% of 280 =
  30. 30.20% of 350 =
  31. 31.10% of 90 =
  32. 32.50% of 790 =
  33. 33.10% of 260 =
  34. 34.25% of 100 =
  35. 35.20% of 480 =
  36. 36.50% of 320 =
  37. 37.15% of 470 =
  38. 38.50% of 40 =
  39. 39.25% of 470 =
  40. 40.50% of 810 =

Answer key

  1. 215
  2. 6
  3. 102
  4. 192.5
  5. 10.5
  6. 86
  7. 85
  8. 225
  9. 137.5
  10. 340
  11. 400
  12. 6
  13. 9
  14. 85
  15. 50
  16. 22
  17. 32
  18. 2.5
  19. 4
  20. 26
  21. 3.9
  22. 42
  23. 45
  24. 174
  25. 9.5
  26. 51
  27. 18
  28. 1.4
  29. 2.8
  30. 70
  31. 9
  32. 395
  33. 26
  34. 25
  35. 96
  36. 160
  37. 70.5
  38. 20
  39. 117.5
  40. 405

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