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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 286 · 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. 1.25% of 680 =
  2. 2.20% of 500 =
  3. 3.5% of 330 =
  4. 4.25% of 500 =
  5. 5.5% of 400 =
  6. 6.10% of 280 =
  7. 7.10% of 580 =
  8. 8.20% of 700 =
  9. 9.25% of 170 =
  10. 10.5% of 60 =
  11. 11.5% of 350 =
  12. 12.20% of 170 =
  13. 13.1% of 350 =
  14. 14.1% of 250 =
  15. 15.5% of 160 =
  16. 16.10% of 790 =
  17. 17.25% of 430 =
  18. 18.20% of 170 =
  19. 19.10% of 600 =
  20. 20.20% of 280 =
  21. 21.5% of 550 =
  22. 22.50% of 580 =
  23. 23.50% of 190 =
  24. 24.50% of 640 =
  25. 25.25% of 570 =
  26. 26.15% of 530 =
  27. 27.50% of 270 =
  28. 28.50% of 340 =
  29. 29.20% of 330 =
  30. 30.10% of 680 =
  31. 31.50% of 520 =
  32. 32.5% of 210 =
  33. 33.1% of 140 =
  34. 34.20% of 640 =
  35. 35.20% of 580 =
  36. 36.15% of 460 =
  37. 37.5% of 410 =
  38. 38.20% of 570 =
  39. 39.10% of 240 =
  40. 40.1% of 560 =

Answer key

  1. 170
  2. 100
  3. 16.5
  4. 125
  5. 20
  6. 28
  7. 58
  8. 140
  9. 42.5
  10. 3
  11. 17.5
  12. 34
  13. 3.5
  14. 2.5
  15. 8
  16. 79
  17. 107.5
  18. 34
  19. 60
  20. 56
  21. 27.5
  22. 290
  23. 95
  24. 320
  25. 142.5
  26. 79.5
  27. 135
  28. 170
  29. 66
  30. 68
  31. 260
  32. 10.5
  33. 1.4
  34. 128
  35. 116
  36. 69
  37. 20.5
  38. 114
  39. 24
  40. 5.6

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