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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 898 · 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. 1.50% of 620 =
  2. 2.10% of 70 =
  3. 3.20% of 500 =
  4. 4.5% of 370 =
  5. 5.25% of 60 =
  6. 6.15% of 320 =
  7. 7.10% of 390 =
  8. 8.25% of 330 =
  9. 9.5% of 650 =
  10. 10.1% of 300 =
  11. 11.10% of 380 =
  12. 12.15% of 570 =
  13. 13.5% of 20 =
  14. 14.5% of 520 =
  15. 15.20% of 90 =
  16. 16.20% of 450 =
  17. 17.1% of 80 =
  18. 18.25% of 890 =
  19. 19.15% of 820 =
  20. 20.20% of 120 =
  21. 21.20% of 510 =
  22. 22.50% of 480 =
  23. 23.50% of 800 =
  24. 24.5% of 240 =
  25. 25.50% of 850 =
  26. 26.10% of 680 =
  27. 27.1% of 810 =
  28. 28.25% of 810 =
  29. 29.10% of 430 =
  30. 30.1% of 840 =
  31. 31.50% of 270 =
  32. 32.10% of 890 =
  33. 33.20% of 600 =
  34. 34.5% of 170 =
  35. 35.50% of 380 =
  36. 36.15% of 520 =
  37. 37.50% of 60 =
  38. 38.50% of 230 =
  39. 39.5% of 820 =
  40. 40.5% of 280 =

Answer key

  1. 310
  2. 7
  3. 100
  4. 18.5
  5. 15
  6. 48
  7. 39
  8. 82.5
  9. 32.5
  10. 3
  11. 38
  12. 85.5
  13. 1
  14. 26
  15. 18
  16. 90
  17. 0.8
  18. 222.5
  19. 123
  20. 24
  21. 102
  22. 240
  23. 400
  24. 12
  25. 425
  26. 68
  27. 8.1
  28. 202.5
  29. 43
  30. 8.4
  31. 135
  32. 89
  33. 120
  34. 8.5
  35. 190
  36. 78
  37. 30
  38. 115
  39. 41
  40. 14

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