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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 938 · 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 110 =
  2. 2.50% of 650 =
  3. 3.5% of 360 =
  4. 4.15% of 320 =
  5. 5.10% of 200 =
  6. 6.20% of 280 =
  7. 7.25% of 540 =
  8. 8.15% of 340 =
  9. 9.5% of 760 =
  10. 10.25% of 460 =
  11. 11.25% of 500 =
  12. 12.5% of 760 =
  13. 13.1% of 700 =
  14. 14.15% of 200 =
  15. 15.20% of 230 =
  16. 16.20% of 830 =
  17. 17.10% of 480 =
  18. 18.50% of 90 =
  19. 19.1% of 520 =
  20. 20.5% of 450 =
  21. 21.25% of 650 =
  22. 22.50% of 70 =
  23. 23.10% of 180 =
  24. 24.20% of 330 =
  25. 25.20% of 350 =
  26. 26.15% of 900 =
  27. 27.10% of 560 =
  28. 28.15% of 170 =
  29. 29.10% of 280 =
  30. 30.10% of 220 =
  31. 31.10% of 60 =
  32. 32.20% of 740 =
  33. 33.5% of 680 =
  34. 34.5% of 650 =
  35. 35.5% of 450 =
  36. 36.20% of 80 =
  37. 37.20% of 220 =
  38. 38.15% of 430 =
  39. 39.25% of 890 =
  40. 40.20% of 750 =

Answer key

  1. 22
  2. 325
  3. 18
  4. 48
  5. 20
  6. 56
  7. 135
  8. 51
  9. 38
  10. 115
  11. 125
  12. 38
  13. 7
  14. 30
  15. 46
  16. 166
  17. 48
  18. 45
  19. 5.2
  20. 22.5
  21. 162.5
  22. 35
  23. 18
  24. 66
  25. 70
  26. 135
  27. 56
  28. 25.5
  29. 28
  30. 22
  31. 6
  32. 148
  33. 34
  34. 32.5
  35. 22.5
  36. 16
  37. 44
  38. 64.5
  39. 222.5
  40. 150

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