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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 997 · 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 640 =
  2. 2.10% of 500 =
  3. 3.10% of 150 =
  4. 4.50% of 600 =
  5. 5.20% of 500 =
  6. 6.5% of 370 =
  7. 7.10% of 580 =
  8. 8.15% of 290 =
  9. 9.25% of 50 =
  10. 10.5% of 440 =
  11. 11.20% of 180 =
  12. 12.25% of 170 =
  13. 13.5% of 650 =
  14. 14.20% of 520 =
  15. 15.1% of 290 =
  16. 16.1% of 850 =
  17. 17.1% of 40 =
  18. 18.25% of 90 =
  19. 19.25% of 260 =
  20. 20.1% of 180 =
  21. 21.15% of 900 =
  22. 22.50% of 280 =
  23. 23.15% of 870 =
  24. 24.10% of 630 =
  25. 25.1% of 320 =
  26. 26.25% of 260 =
  27. 27.10% of 160 =
  28. 28.25% of 30 =
  29. 29.1% of 880 =
  30. 30.10% of 400 =
  31. 31.50% of 860 =
  32. 32.1% of 500 =
  33. 33.50% of 290 =
  34. 34.50% of 630 =
  35. 35.15% of 470 =
  36. 36.5% of 180 =
  37. 37.15% of 310 =
  38. 38.5% of 860 =
  39. 39.10% of 60 =
  40. 40.10% of 750 =

Answer key

  1. 32
  2. 50
  3. 15
  4. 300
  5. 100
  6. 18.5
  7. 58
  8. 43.5
  9. 12.5
  10. 22
  11. 36
  12. 42.5
  13. 32.5
  14. 104
  15. 2.9
  16. 8.5
  17. 0.4
  18. 22.5
  19. 65
  20. 1.8
  21. 135
  22. 140
  23. 130.5
  24. 63
  25. 3.2
  26. 65
  27. 16
  28. 7.5
  29. 8.8
  30. 40
  31. 430
  32. 5
  33. 145
  34. 315
  35. 70.5
  36. 9
  37. 46.5
  38. 43
  39. 6
  40. 75

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