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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 901 · 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 790 =
  2. 2.20% of 690 =
  3. 3.50% of 690 =
  4. 4.20% of 860 =
  5. 5.5% of 510 =
  6. 6.1% of 730 =
  7. 7.20% of 890 =
  8. 8.1% of 220 =
  9. 9.10% of 470 =
  10. 10.25% of 790 =
  11. 11.25% of 110 =
  12. 12.1% of 750 =
  13. 13.15% of 310 =
  14. 14.25% of 60 =
  15. 15.20% of 580 =
  16. 16.25% of 400 =
  17. 17.10% of 80 =
  18. 18.5% of 510 =
  19. 19.50% of 790 =
  20. 20.50% of 130 =
  21. 21.20% of 180 =
  22. 22.25% of 150 =
  23. 23.5% of 480 =
  24. 24.5% of 860 =
  25. 25.20% of 580 =
  26. 26.10% of 830 =
  27. 27.50% of 380 =
  28. 28.25% of 110 =
  29. 29.50% of 160 =
  30. 30.15% of 810 =
  31. 31.15% of 150 =
  32. 32.50% of 400 =
  33. 33.20% of 120 =
  34. 34.5% of 460 =
  35. 35.5% of 240 =
  36. 36.20% of 720 =
  37. 37.5% of 370 =
  38. 38.1% of 770 =
  39. 39.50% of 440 =
  40. 40.25% of 390 =

Answer key

  1. 158
  2. 138
  3. 345
  4. 172
  5. 25.5
  6. 7.3
  7. 178
  8. 2.2
  9. 47
  10. 197.5
  11. 27.5
  12. 7.5
  13. 46.5
  14. 15
  15. 116
  16. 100
  17. 8
  18. 25.5
  19. 395
  20. 65
  21. 36
  22. 37.5
  23. 24
  24. 43
  25. 116
  26. 83
  27. 190
  28. 27.5
  29. 80
  30. 121.5
  31. 22.5
  32. 200
  33. 24
  34. 23
  35. 12
  36. 144
  37. 18.5
  38. 7.7
  39. 220
  40. 97.5

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