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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 869 · 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. 1.1% of 490 =
  2. 2.5% of 320 =
  3. 3.20% of 280 =
  4. 4.15% of 380 =
  5. 5.5% of 880 =
  6. 6.50% of 770 =
  7. 7.25% of 650 =
  8. 8.5% of 710 =
  9. 9.25% of 430 =
  10. 10.10% of 550 =
  11. 11.20% of 110 =
  12. 12.5% of 220 =
  13. 13.1% of 190 =
  14. 14.50% of 720 =
  15. 15.20% of 640 =
  16. 16.25% of 480 =
  17. 17.20% of 660 =
  18. 18.10% of 400 =
  19. 19.25% of 630 =
  20. 20.5% of 460 =
  21. 21.5% of 330 =
  22. 22.25% of 770 =
  23. 23.5% of 580 =
  24. 24.20% of 270 =
  25. 25.25% of 650 =
  26. 26.10% of 220 =
  27. 27.10% of 330 =
  28. 28.50% of 300 =
  29. 29.20% of 310 =
  30. 30.50% of 750 =
  31. 31.15% of 350 =
  32. 32.25% of 70 =
  33. 33.10% of 650 =
  34. 34.20% of 80 =
  35. 35.5% of 560 =
  36. 36.15% of 200 =
  37. 37.10% of 540 =
  38. 38.25% of 890 =
  39. 39.10% of 360 =
  40. 40.10% of 860 =

Answer key

  1. 4.9
  2. 16
  3. 56
  4. 57
  5. 44
  6. 385
  7. 162.5
  8. 35.5
  9. 107.5
  10. 55
  11. 22
  12. 11
  13. 1.9
  14. 360
  15. 128
  16. 120
  17. 132
  18. 40
  19. 157.5
  20. 23
  21. 16.5
  22. 192.5
  23. 29
  24. 54
  25. 162.5
  26. 22
  27. 33
  28. 150
  29. 62
  30. 375
  31. 52.5
  32. 17.5
  33. 65
  34. 16
  35. 28
  36. 30
  37. 54
  38. 222.5
  39. 36
  40. 86

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