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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 64 · 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 290 =
  2. 2.25% of 120 =
  3. 3.25% of 750 =
  4. 4.10% of 200 =
  5. 5.15% of 110 =
  6. 6.10% of 470 =
  7. 7.20% of 110 =
  8. 8.5% of 480 =
  9. 9.10% of 630 =
  10. 10.50% of 690 =
  11. 11.5% of 360 =
  12. 12.50% of 560 =
  13. 13.10% of 390 =
  14. 14.1% of 680 =
  15. 15.5% of 350 =
  16. 16.25% of 60 =
  17. 17.25% of 780 =
  18. 18.1% of 50 =
  19. 19.10% of 640 =
  20. 20.1% of 800 =
  21. 21.1% of 290 =
  22. 22.50% of 20 =
  23. 23.15% of 220 =
  24. 24.5% of 540 =
  25. 25.20% of 830 =
  26. 26.1% of 90 =
  27. 27.20% of 820 =
  28. 28.50% of 260 =
  29. 29.10% of 890 =
  30. 30.15% of 440 =
  31. 31.5% of 250 =
  32. 32.15% of 190 =
  33. 33.5% of 80 =
  34. 34.10% of 510 =
  35. 35.25% of 80 =
  36. 36.10% of 320 =
  37. 37.50% of 460 =
  38. 38.10% of 820 =
  39. 39.15% of 540 =
  40. 40.50% of 750 =

Answer key

  1. 43.5
  2. 30
  3. 187.5
  4. 20
  5. 16.5
  6. 47
  7. 22
  8. 24
  9. 63
  10. 345
  11. 18
  12. 280
  13. 39
  14. 6.8
  15. 17.5
  16. 15
  17. 195
  18. 0.5
  19. 64
  20. 8
  21. 2.9
  22. 10
  23. 33
  24. 27
  25. 166
  26. 0.9
  27. 164
  28. 130
  29. 89
  30. 66
  31. 12.5
  32. 28.5
  33. 4
  34. 51
  35. 20
  36. 32
  37. 230
  38. 82
  39. 81
  40. 375

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