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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 927 · 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 870 =
  2. 2.5% of 180 =
  3. 3.1% of 360 =
  4. 4.5% of 140 =
  5. 5.20% of 180 =
  6. 6.25% of 810 =
  7. 7.20% of 60 =
  8. 8.10% of 220 =
  9. 9.25% of 810 =
  10. 10.15% of 550 =
  11. 11.1% of 290 =
  12. 12.10% of 800 =
  13. 13.10% of 230 =
  14. 14.1% of 420 =
  15. 15.1% of 360 =
  16. 16.20% of 630 =
  17. 17.5% of 690 =
  18. 18.5% of 710 =
  19. 19.20% of 780 =
  20. 20.20% of 900 =
  21. 21.5% of 310 =
  22. 22.5% of 250 =
  23. 23.10% of 840 =
  24. 24.5% of 220 =
  25. 25.5% of 240 =
  26. 26.25% of 820 =
  27. 27.1% of 530 =
  28. 28.10% of 490 =
  29. 29.15% of 900 =
  30. 30.20% of 50 =
  31. 31.50% of 140 =
  32. 32.10% of 350 =
  33. 33.1% of 240 =
  34. 34.20% of 820 =
  35. 35.5% of 900 =
  36. 36.25% of 770 =
  37. 37.20% of 380 =
  38. 38.1% of 510 =
  39. 39.25% of 890 =
  40. 40.10% of 700 =

Answer key

  1. 217.5
  2. 9
  3. 3.6
  4. 7
  5. 36
  6. 202.5
  7. 12
  8. 22
  9. 202.5
  10. 82.5
  11. 2.9
  12. 80
  13. 23
  14. 4.2
  15. 3.6
  16. 126
  17. 34.5
  18. 35.5
  19. 156
  20. 180
  21. 15.5
  22. 12.5
  23. 84
  24. 11
  25. 12
  26. 205
  27. 5.3
  28. 49
  29. 135
  30. 10
  31. 70
  32. 35
  33. 2.4
  34. 164
  35. 45
  36. 192.5
  37. 76
  38. 5.1
  39. 222.5
  40. 70

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