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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 24 · 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. 1.15% of 80 =
  2. 2.1% of 290 =
  3. 3.1% of 180 =
  4. 4.15% of 590 =
  5. 5.5% of 430 =
  6. 6.15% of 730 =
  7. 7.10% of 90 =
  8. 8.10% of 870 =
  9. 9.1% of 30 =
  10. 10.5% of 90 =
  11. 11.20% of 120 =
  12. 12.1% of 280 =
  13. 13.1% of 810 =
  14. 14.5% of 270 =
  15. 15.15% of 170 =
  16. 16.1% of 670 =
  17. 17.50% of 700 =
  18. 18.15% of 390 =
  19. 19.50% of 180 =
  20. 20.20% of 780 =
  21. 21.25% of 240 =
  22. 22.10% of 420 =
  23. 23.5% of 650 =
  24. 24.20% of 680 =
  25. 25.1% of 710 =
  26. 26.20% of 50 =
  27. 27.50% of 300 =
  28. 28.15% of 250 =
  29. 29.10% of 370 =
  30. 30.1% of 900 =
  31. 31.5% of 170 =
  32. 32.15% of 50 =
  33. 33.25% of 60 =
  34. 34.10% of 450 =
  35. 35.5% of 80 =
  36. 36.1% of 700 =
  37. 37.25% of 570 =
  38. 38.20% of 30 =
  39. 39.10% of 60 =
  40. 40.15% of 860 =

Answer key

  1. 12
  2. 2.9
  3. 1.8
  4. 88.5
  5. 21.5
  6. 109.5
  7. 9
  8. 87
  9. 0.3
  10. 4.5
  11. 24
  12. 2.8
  13. 8.1
  14. 13.5
  15. 25.5
  16. 6.7
  17. 350
  18. 58.5
  19. 90
  20. 156
  21. 60
  22. 42
  23. 32.5
  24. 136
  25. 7.1
  26. 10
  27. 150
  28. 37.5
  29. 37
  30. 9
  31. 8.5
  32. 7.5
  33. 15
  34. 45
  35. 4
  36. 7
  37. 142.5
  38. 6
  39. 6
  40. 129

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