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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 928 · 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. 1.25% of 870 =
  2. 2.50% of 80 =
  3. 3.1% of 270 =
  4. 4.25% of 590 =
  5. 5.5% of 680 =
  6. 6.25% of 420 =
  7. 7.1% of 180 =
  8. 8.20% of 620 =
  9. 9.10% of 710 =
  10. 10.15% of 860 =
  11. 11.25% of 130 =
  12. 12.1% of 250 =
  13. 13.20% of 190 =
  14. 14.1% of 690 =
  15. 15.20% of 220 =
  16. 16.1% of 690 =
  17. 17.20% of 570 =
  18. 18.20% of 190 =
  19. 19.10% of 720 =
  20. 20.1% of 320 =
  21. 21.10% of 260 =
  22. 22.10% of 270 =
  23. 23.10% of 230 =
  24. 24.50% of 640 =
  25. 25.15% of 260 =
  26. 26.50% of 180 =
  27. 27.50% of 330 =
  28. 28.5% of 150 =
  29. 29.50% of 280 =
  30. 30.20% of 500 =
  31. 31.15% of 350 =
  32. 32.10% of 170 =
  33. 33.1% of 170 =
  34. 34.20% of 760 =
  35. 35.25% of 170 =
  36. 36.20% of 560 =
  37. 37.15% of 620 =
  38. 38.25% of 750 =
  39. 39.15% of 70 =
  40. 40.10% of 260 =

Answer key

  1. 217.5
  2. 40
  3. 2.7
  4. 147.5
  5. 34
  6. 105
  7. 1.8
  8. 124
  9. 71
  10. 129
  11. 32.5
  12. 2.5
  13. 38
  14. 6.9
  15. 44
  16. 6.9
  17. 114
  18. 38
  19. 72
  20. 3.2
  21. 26
  22. 27
  23. 23
  24. 320
  25. 39
  26. 90
  27. 165
  28. 7.5
  29. 140
  30. 100
  31. 52.5
  32. 17
  33. 1.7
  34. 152
  35. 42.5
  36. 112
  37. 93
  38. 187.5
  39. 10.5
  40. 26

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