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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 359 · 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 20 =
  2. 2.50% of 230 =
  3. 3.5% of 170 =
  4. 4.15% of 580 =
  5. 5.5% of 730 =
  6. 6.15% of 140 =
  7. 7.10% of 680 =
  8. 8.10% of 200 =
  9. 9.50% of 290 =
  10. 10.10% of 120 =
  11. 11.5% of 300 =
  12. 12.15% of 40 =
  13. 13.10% of 610 =
  14. 14.10% of 180 =
  15. 15.10% of 190 =
  16. 16.1% of 80 =
  17. 17.25% of 510 =
  18. 18.15% of 470 =
  19. 19.10% of 380 =
  20. 20.15% of 540 =
  21. 21.15% of 860 =
  22. 22.5% of 80 =
  23. 23.20% of 420 =
  24. 24.5% of 430 =
  25. 25.10% of 530 =
  26. 26.15% of 320 =
  27. 27.25% of 550 =
  28. 28.25% of 170 =
  29. 29.1% of 660 =
  30. 30.20% of 460 =
  31. 31.1% of 900 =
  32. 32.25% of 190 =
  33. 33.10% of 460 =
  34. 34.1% of 200 =
  35. 35.50% of 460 =
  36. 36.10% of 170 =
  37. 37.10% of 640 =
  38. 38.25% of 570 =
  39. 39.25% of 350 =
  40. 40.50% of 210 =

Answer key

  1. 2
  2. 115
  3. 8.5
  4. 87
  5. 36.5
  6. 21
  7. 68
  8. 20
  9. 145
  10. 12
  11. 15
  12. 6
  13. 61
  14. 18
  15. 19
  16. 0.8
  17. 127.5
  18. 70.5
  19. 38
  20. 81
  21. 129
  22. 4
  23. 84
  24. 21.5
  25. 53
  26. 48
  27. 137.5
  28. 42.5
  29. 6.6
  30. 92
  31. 9
  32. 47.5
  33. 46
  34. 2
  35. 230
  36. 17
  37. 64
  38. 142.5
  39. 87.5
  40. 105

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