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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 46 · 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 200 =
  2. 2.5% of 350 =
  3. 3.10% of 20 =
  4. 4.25% of 270 =
  5. 5.15% of 30 =
  6. 6.5% of 580 =
  7. 7.25% of 40 =
  8. 8.20% of 680 =
  9. 9.25% of 400 =
  10. 10.1% of 150 =
  11. 11.25% of 30 =
  12. 12.15% of 140 =
  13. 13.15% of 570 =
  14. 14.20% of 470 =
  15. 15.5% of 810 =
  16. 16.10% of 20 =
  17. 17.1% of 520 =
  18. 18.1% of 670 =
  19. 19.25% of 170 =
  20. 20.15% of 240 =
  21. 21.50% of 680 =
  22. 22.5% of 100 =
  23. 23.20% of 750 =
  24. 24.10% of 300 =
  25. 25.50% of 730 =
  26. 26.50% of 630 =
  27. 27.10% of 210 =
  28. 28.15% of 90 =
  29. 29.25% of 160 =
  30. 30.10% of 190 =
  31. 31.15% of 240 =
  32. 32.10% of 850 =
  33. 33.25% of 630 =
  34. 34.50% of 160 =
  35. 35.10% of 680 =
  36. 36.10% of 730 =
  37. 37.5% of 160 =
  38. 38.15% of 100 =
  39. 39.1% of 210 =
  40. 40.50% of 280 =

Answer key

  1. 10
  2. 17.5
  3. 2
  4. 67.5
  5. 4.5
  6. 29
  7. 10
  8. 136
  9. 100
  10. 1.5
  11. 7.5
  12. 21
  13. 85.5
  14. 94
  15. 40.5
  16. 2
  17. 5.2
  18. 6.7
  19. 42.5
  20. 36
  21. 340
  22. 5
  23. 150
  24. 30
  25. 365
  26. 315
  27. 21
  28. 13.5
  29. 40
  30. 19
  31. 36
  32. 85
  33. 157.5
  34. 80
  35. 68
  36. 73
  37. 8
  38. 15
  39. 2.1
  40. 140

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