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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 867 · 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 230 =
  2. 2.50% of 80 =
  3. 3.50% of 570 =
  4. 4.20% of 100 =
  5. 5.25% of 590 =
  6. 6.1% of 70 =
  7. 7.25% of 30 =
  8. 8.5% of 850 =
  9. 9.5% of 160 =
  10. 10.1% of 810 =
  11. 11.1% of 250 =
  12. 12.50% of 410 =
  13. 13.25% of 560 =
  14. 14.1% of 490 =
  15. 15.15% of 390 =
  16. 16.10% of 110 =
  17. 17.5% of 420 =
  18. 18.10% of 320 =
  19. 19.25% of 540 =
  20. 20.1% of 740 =
  21. 21.20% of 200 =
  22. 22.25% of 30 =
  23. 23.20% of 200 =
  24. 24.10% of 260 =
  25. 25.50% of 700 =
  26. 26.10% of 570 =
  27. 27.15% of 320 =
  28. 28.15% of 240 =
  29. 29.50% of 80 =
  30. 30.5% of 490 =
  31. 31.25% of 80 =
  32. 32.25% of 810 =
  33. 33.25% of 690 =
  34. 34.15% of 130 =
  35. 35.1% of 580 =
  36. 36.20% of 210 =
  37. 37.20% of 140 =
  38. 38.10% of 270 =
  39. 39.25% of 790 =
  40. 40.25% of 340 =

Answer key

  1. 2.3
  2. 40
  3. 285
  4. 20
  5. 147.5
  6. 0.7
  7. 7.5
  8. 42.5
  9. 8
  10. 8.1
  11. 2.5
  12. 205
  13. 140
  14. 4.9
  15. 58.5
  16. 11
  17. 21
  18. 32
  19. 135
  20. 7.4
  21. 40
  22. 7.5
  23. 40
  24. 26
  25. 350
  26. 57
  27. 48
  28. 36
  29. 40
  30. 24.5
  31. 20
  32. 202.5
  33. 172.5
  34. 19.5
  35. 5.8
  36. 42
  37. 28
  38. 27
  39. 197.5
  40. 85

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