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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 642 · 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. 1.20% of 230 =
  2. 2.1% of 30 =
  3. 3.5% of 40 =
  4. 4.1% of 110 =
  5. 5.50% of 310 =
  6. 6.15% of 340 =
  7. 7.15% of 620 =
  8. 8.5% of 660 =
  9. 9.5% of 340 =
  10. 10.50% of 230 =
  11. 11.10% of 430 =
  12. 12.5% of 870 =
  13. 13.20% of 140 =
  14. 14.1% of 580 =
  15. 15.10% of 20 =
  16. 16.25% of 880 =
  17. 17.10% of 130 =
  18. 18.50% of 570 =
  19. 19.10% of 270 =
  20. 20.1% of 210 =
  21. 21.15% of 60 =
  22. 22.5% of 190 =
  23. 23.15% of 100 =
  24. 24.5% of 90 =
  25. 25.20% of 700 =
  26. 26.10% of 90 =
  27. 27.25% of 250 =
  28. 28.15% of 590 =
  29. 29.20% of 390 =
  30. 30.5% of 410 =
  31. 31.25% of 120 =
  32. 32.10% of 630 =
  33. 33.10% of 220 =
  34. 34.25% of 800 =
  35. 35.20% of 450 =
  36. 36.10% of 820 =
  37. 37.25% of 20 =
  38. 38.10% of 530 =
  39. 39.5% of 800 =
  40. 40.20% of 440 =

Answer key

  1. 46
  2. 0.3
  3. 2
  4. 1.1
  5. 155
  6. 51
  7. 93
  8. 33
  9. 17
  10. 115
  11. 43
  12. 43.5
  13. 28
  14. 5.8
  15. 2
  16. 220
  17. 13
  18. 285
  19. 27
  20. 2.1
  21. 9
  22. 9.5
  23. 15
  24. 4.5
  25. 140
  26. 9
  27. 62.5
  28. 88.5
  29. 78
  30. 20.5
  31. 30
  32. 63
  33. 22
  34. 200
  35. 90
  36. 82
  37. 5
  38. 53
  39. 40
  40. 88

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