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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 921 · 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. 1.15% of 360 =
  2. 2.5% of 330 =
  3. 3.1% of 540 =
  4. 4.15% of 40 =
  5. 5.15% of 840 =
  6. 6.15% of 50 =
  7. 7.10% of 850 =
  8. 8.10% of 210 =
  9. 9.5% of 190 =
  10. 10.50% of 180 =
  11. 11.1% of 240 =
  12. 12.10% of 500 =
  13. 13.15% of 650 =
  14. 14.25% of 200 =
  15. 15.15% of 790 =
  16. 16.20% of 170 =
  17. 17.5% of 850 =
  18. 18.5% of 460 =
  19. 19.1% of 260 =
  20. 20.25% of 210 =
  21. 21.5% of 430 =
  22. 22.20% of 60 =
  23. 23.50% of 310 =
  24. 24.25% of 140 =
  25. 25.10% of 250 =
  26. 26.15% of 870 =
  27. 27.10% of 880 =
  28. 28.20% of 260 =
  29. 29.50% of 650 =
  30. 30.10% of 260 =
  31. 31.10% of 900 =
  32. 32.5% of 230 =
  33. 33.25% of 450 =
  34. 34.20% of 800 =
  35. 35.20% of 170 =
  36. 36.15% of 700 =
  37. 37.5% of 780 =
  38. 38.25% of 800 =
  39. 39.20% of 840 =
  40. 40.25% of 80 =

Answer key

  1. 54
  2. 16.5
  3. 5.4
  4. 6
  5. 126
  6. 7.5
  7. 85
  8. 21
  9. 9.5
  10. 90
  11. 2.4
  12. 50
  13. 97.5
  14. 50
  15. 118.5
  16. 34
  17. 42.5
  18. 23
  19. 2.6
  20. 52.5
  21. 21.5
  22. 12
  23. 155
  24. 35
  25. 25
  26. 130.5
  27. 88
  28. 52
  29. 325
  30. 26
  31. 90
  32. 11.5
  33. 112.5
  34. 160
  35. 34
  36. 105
  37. 39
  38. 200
  39. 168
  40. 20

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