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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 205 · 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. 1.50% of 100 =
  2. 2.25% of 370 =
  3. 3.20% of 800 =
  4. 4.20% of 300 =
  5. 5.10% of 200 =
  6. 6.5% of 730 =
  7. 7.1% of 220 =
  8. 8.50% of 650 =
  9. 9.20% of 440 =
  10. 10.15% of 750 =
  11. 11.20% of 130 =
  12. 12.25% of 480 =
  13. 13.50% of 130 =
  14. 14.25% of 660 =
  15. 15.1% of 680 =
  16. 16.20% of 390 =
  17. 17.5% of 650 =
  18. 18.10% of 260 =
  19. 19.5% of 410 =
  20. 20.20% of 530 =
  21. 21.1% of 20 =
  22. 22.15% of 550 =
  23. 23.1% of 510 =
  24. 24.25% of 410 =
  25. 25.25% of 660 =
  26. 26.15% of 660 =
  27. 27.20% of 780 =
  28. 28.10% of 500 =
  29. 29.25% of 130 =
  30. 30.20% of 280 =
  31. 31.1% of 360 =
  32. 32.10% of 410 =
  33. 33.5% of 50 =
  34. 34.25% of 760 =
  35. 35.50% of 840 =
  36. 36.25% of 280 =
  37. 37.10% of 50 =
  38. 38.50% of 380 =
  39. 39.25% of 720 =
  40. 40.25% of 690 =

Answer key

  1. 50
  2. 92.5
  3. 160
  4. 60
  5. 20
  6. 36.5
  7. 2.2
  8. 325
  9. 88
  10. 112.5
  11. 26
  12. 120
  13. 65
  14. 165
  15. 6.8
  16. 78
  17. 32.5
  18. 26
  19. 20.5
  20. 106
  21. 0.2
  22. 82.5
  23. 5.1
  24. 102.5
  25. 165
  26. 99
  27. 156
  28. 50
  29. 32.5
  30. 56
  31. 3.6
  32. 41
  33. 2.5
  34. 190
  35. 420
  36. 70
  37. 5
  38. 190
  39. 180
  40. 172.5

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