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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 66 · 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. 1.10% of 540 =
  2. 2.50% of 590 =
  3. 3.15% of 250 =
  4. 4.5% of 660 =
  5. 5.15% of 580 =
  6. 6.1% of 250 =
  7. 7.10% of 380 =
  8. 8.20% of 230 =
  9. 9.15% of 250 =
  10. 10.5% of 260 =
  11. 11.20% of 340 =
  12. 12.1% of 880 =
  13. 13.5% of 150 =
  14. 14.50% of 340 =
  15. 15.15% of 160 =
  16. 16.15% of 650 =
  17. 17.5% of 130 =
  18. 18.20% of 710 =
  19. 19.50% of 770 =
  20. 20.5% of 880 =
  21. 21.1% of 630 =
  22. 22.25% of 140 =
  23. 23.1% of 680 =
  24. 24.10% of 680 =
  25. 25.25% of 440 =
  26. 26.10% of 510 =
  27. 27.5% of 260 =
  28. 28.15% of 660 =
  29. 29.5% of 740 =
  30. 30.1% of 440 =
  31. 31.15% of 70 =
  32. 32.25% of 130 =
  33. 33.20% of 770 =
  34. 34.15% of 440 =
  35. 35.50% of 180 =
  36. 36.15% of 730 =
  37. 37.50% of 560 =
  38. 38.50% of 490 =
  39. 39.5% of 30 =
  40. 40.50% of 180 =

Answer key

  1. 54
  2. 295
  3. 37.5
  4. 33
  5. 87
  6. 2.5
  7. 38
  8. 46
  9. 37.5
  10. 13
  11. 68
  12. 8.8
  13. 7.5
  14. 170
  15. 24
  16. 97.5
  17. 6.5
  18. 142
  19. 385
  20. 44
  21. 6.3
  22. 35
  23. 6.8
  24. 68
  25. 110
  26. 51
  27. 13
  28. 99
  29. 37
  30. 4.4
  31. 10.5
  32. 32.5
  33. 154
  34. 66
  35. 90
  36. 109.5
  37. 280
  38. 245
  39. 1.5
  40. 90

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