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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 843 · 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 570 =
  2. 2.10% of 100 =
  3. 3.5% of 280 =
  4. 4.25% of 550 =
  5. 5.50% of 230 =
  6. 6.5% of 790 =
  7. 7.50% of 430 =
  8. 8.1% of 800 =
  9. 9.10% of 140 =
  10. 10.25% of 350 =
  11. 11.15% of 880 =
  12. 12.5% of 770 =
  13. 13.1% of 850 =
  14. 14.50% of 630 =
  15. 15.50% of 820 =
  16. 16.10% of 480 =
  17. 17.25% of 80 =
  18. 18.10% of 50 =
  19. 19.10% of 190 =
  20. 20.10% of 740 =
  21. 21.50% of 40 =
  22. 22.25% of 280 =
  23. 23.25% of 220 =
  24. 24.20% of 710 =
  25. 25.15% of 140 =
  26. 26.50% of 110 =
  27. 27.5% of 460 =
  28. 28.25% of 410 =
  29. 29.10% of 260 =
  30. 30.10% of 140 =
  31. 31.25% of 540 =
  32. 32.15% of 470 =
  33. 33.1% of 470 =
  34. 34.25% of 750 =
  35. 35.50% of 800 =
  36. 36.1% of 660 =
  37. 37.5% of 330 =
  38. 38.10% of 900 =
  39. 39.20% of 840 =
  40. 40.15% of 690 =

Answer key

  1. 5.7
  2. 10
  3. 14
  4. 137.5
  5. 115
  6. 39.5
  7. 215
  8. 8
  9. 14
  10. 87.5
  11. 132
  12. 38.5
  13. 8.5
  14. 315
  15. 410
  16. 48
  17. 20
  18. 5
  19. 19
  20. 74
  21. 20
  22. 70
  23. 55
  24. 142
  25. 21
  26. 55
  27. 23
  28. 102.5
  29. 26
  30. 14
  31. 135
  32. 70.5
  33. 4.7
  34. 187.5
  35. 400
  36. 6.6
  37. 16.5
  38. 90
  39. 168
  40. 103.5

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