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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 186 · 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 250 =
  2. 2.10% of 360 =
  3. 3.5% of 160 =
  4. 4.25% of 420 =
  5. 5.10% of 180 =
  6. 6.50% of 170 =
  7. 7.5% of 330 =
  8. 8.25% of 560 =
  9. 9.50% of 690 =
  10. 10.20% of 550 =
  11. 11.15% of 40 =
  12. 12.10% of 750 =
  13. 13.10% of 750 =
  14. 14.20% of 50 =
  15. 15.20% of 700 =
  16. 16.5% of 400 =
  17. 17.10% of 260 =
  18. 18.1% of 120 =
  19. 19.15% of 780 =
  20. 20.50% of 100 =
  21. 21.15% of 650 =
  22. 22.50% of 840 =
  23. 23.1% of 590 =
  24. 24.1% of 300 =
  25. 25.25% of 260 =
  26. 26.20% of 450 =
  27. 27.15% of 360 =
  28. 28.50% of 160 =
  29. 29.50% of 620 =
  30. 30.1% of 680 =
  31. 31.5% of 30 =
  32. 32.10% of 200 =
  33. 33.50% of 530 =
  34. 34.15% of 470 =
  35. 35.50% of 220 =
  36. 36.10% of 240 =
  37. 37.5% of 720 =
  38. 38.10% of 200 =
  39. 39.50% of 590 =
  40. 40.1% of 440 =

Answer key

  1. 25
  2. 36
  3. 8
  4. 105
  5. 18
  6. 85
  7. 16.5
  8. 140
  9. 345
  10. 110
  11. 6
  12. 75
  13. 75
  14. 10
  15. 140
  16. 20
  17. 26
  18. 1.2
  19. 117
  20. 50
  21. 97.5
  22. 420
  23. 5.9
  24. 3
  25. 65
  26. 90
  27. 54
  28. 80
  29. 310
  30. 6.8
  31. 1.5
  32. 20
  33. 265
  34. 70.5
  35. 110
  36. 24
  37. 36
  38. 20
  39. 295
  40. 4.4

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