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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 870 · 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. 1.5% of 810 =
  2. 2.25% of 540 =
  3. 3.10% of 420 =
  4. 4.50% of 190 =
  5. 5.10% of 610 =
  6. 6.20% of 650 =
  7. 7.5% of 600 =
  8. 8.50% of 320 =
  9. 9.20% of 20 =
  10. 10.20% of 670 =
  11. 11.20% of 810 =
  12. 12.50% of 710 =
  13. 13.25% of 200 =
  14. 14.25% of 680 =
  15. 15.10% of 70 =
  16. 16.10% of 170 =
  17. 17.5% of 140 =
  18. 18.10% of 760 =
  19. 19.20% of 850 =
  20. 20.15% of 90 =
  21. 21.50% of 520 =
  22. 22.5% of 40 =
  23. 23.20% of 70 =
  24. 24.25% of 510 =
  25. 25.25% of 60 =
  26. 26.5% of 870 =
  27. 27.1% of 190 =
  28. 28.15% of 660 =
  29. 29.1% of 260 =
  30. 30.10% of 250 =
  31. 31.5% of 460 =
  32. 32.10% of 760 =
  33. 33.15% of 340 =
  34. 34.20% of 470 =
  35. 35.15% of 840 =
  36. 36.15% of 630 =
  37. 37.50% of 500 =
  38. 38.15% of 710 =
  39. 39.20% of 560 =
  40. 40.25% of 570 =

Answer key

  1. 40.5
  2. 135
  3. 42
  4. 95
  5. 61
  6. 130
  7. 30
  8. 160
  9. 4
  10. 134
  11. 162
  12. 355
  13. 50
  14. 170
  15. 7
  16. 17
  17. 7
  18. 76
  19. 170
  20. 13.5
  21. 260
  22. 2
  23. 14
  24. 127.5
  25. 15
  26. 43.5
  27. 1.9
  28. 99
  29. 2.6
  30. 25
  31. 23
  32. 76
  33. 51
  34. 94
  35. 126
  36. 94.5
  37. 250
  38. 106.5
  39. 112
  40. 142.5

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