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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 699 · 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. 1.10% of 850 =
  2. 2.1% of 880 =
  3. 3.1% of 640 =
  4. 4.10% of 870 =
  5. 5.15% of 420 =
  6. 6.50% of 130 =
  7. 7.20% of 890 =
  8. 8.10% of 230 =
  9. 9.1% of 240 =
  10. 10.10% of 350 =
  11. 11.25% of 280 =
  12. 12.50% of 890 =
  13. 13.25% of 470 =
  14. 14.5% of 150 =
  15. 15.10% of 250 =
  16. 16.5% of 430 =
  17. 17.20% of 900 =
  18. 18.50% of 150 =
  19. 19.25% of 110 =
  20. 20.5% of 340 =
  21. 21.25% of 260 =
  22. 22.5% of 610 =
  23. 23.5% of 240 =
  24. 24.25% of 590 =
  25. 25.5% of 580 =
  26. 26.1% of 870 =
  27. 27.15% of 280 =
  28. 28.1% of 160 =
  29. 29.25% of 540 =
  30. 30.1% of 230 =
  31. 31.1% of 420 =
  32. 32.50% of 860 =
  33. 33.1% of 280 =
  34. 34.25% of 370 =
  35. 35.10% of 120 =
  36. 36.25% of 40 =
  37. 37.1% of 500 =
  38. 38.25% of 40 =
  39. 39.50% of 150 =
  40. 40.20% of 880 =

Answer key

  1. 85
  2. 8.8
  3. 6.4
  4. 87
  5. 63
  6. 65
  7. 178
  8. 23
  9. 2.4
  10. 35
  11. 70
  12. 445
  13. 117.5
  14. 7.5
  15. 25
  16. 21.5
  17. 180
  18. 75
  19. 27.5
  20. 17
  21. 65
  22. 30.5
  23. 12
  24. 147.5
  25. 29
  26. 8.7
  27. 42
  28. 1.6
  29. 135
  30. 2.3
  31. 4.2
  32. 430
  33. 2.8
  34. 92.5
  35. 12
  36. 10
  37. 5
  38. 10
  39. 75
  40. 176

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