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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 954 · 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 110 =
  2. 2.15% of 730 =
  3. 3.50% of 680 =
  4. 4.25% of 300 =
  5. 5.25% of 470 =
  6. 6.5% of 270 =
  7. 7.50% of 570 =
  8. 8.20% of 530 =
  9. 9.20% of 250 =
  10. 10.50% of 760 =
  11. 11.25% of 150 =
  12. 12.1% of 210 =
  13. 13.25% of 610 =
  14. 14.15% of 260 =
  15. 15.10% of 620 =
  16. 16.15% of 80 =
  17. 17.10% of 420 =
  18. 18.10% of 250 =
  19. 19.10% of 360 =
  20. 20.10% of 290 =
  21. 21.20% of 70 =
  22. 22.10% of 480 =
  23. 23.15% of 210 =
  24. 24.10% of 380 =
  25. 25.50% of 660 =
  26. 26.10% of 100 =
  27. 27.25% of 660 =
  28. 28.25% of 150 =
  29. 29.25% of 410 =
  30. 30.25% of 80 =
  31. 31.50% of 130 =
  32. 32.50% of 30 =
  33. 33.20% of 740 =
  34. 34.20% of 670 =
  35. 35.25% of 290 =
  36. 36.20% of 170 =
  37. 37.1% of 660 =
  38. 38.25% of 830 =
  39. 39.50% of 150 =
  40. 40.50% of 250 =

Answer key

  1. 27.5
  2. 109.5
  3. 340
  4. 75
  5. 117.5
  6. 13.5
  7. 285
  8. 106
  9. 50
  10. 380
  11. 37.5
  12. 2.1
  13. 152.5
  14. 39
  15. 62
  16. 12
  17. 42
  18. 25
  19. 36
  20. 29
  21. 14
  22. 48
  23. 31.5
  24. 38
  25. 330
  26. 10
  27. 165
  28. 37.5
  29. 102.5
  30. 20
  31. 65
  32. 15
  33. 148
  34. 134
  35. 72.5
  36. 34
  37. 6.6
  38. 207.5
  39. 75
  40. 125

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