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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 387 · 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 180 =
  2. 2.50% of 260 =
  3. 3.20% of 540 =
  4. 4.5% of 800 =
  5. 5.1% of 200 =
  6. 6.1% of 40 =
  7. 7.20% of 210 =
  8. 8.50% of 680 =
  9. 9.20% of 770 =
  10. 10.20% of 20 =
  11. 11.25% of 790 =
  12. 12.5% of 80 =
  13. 13.25% of 110 =
  14. 14.20% of 850 =
  15. 15.5% of 60 =
  16. 16.50% of 870 =
  17. 17.10% of 900 =
  18. 18.50% of 110 =
  19. 19.5% of 720 =
  20. 20.15% of 730 =
  21. 21.1% of 800 =
  22. 22.5% of 280 =
  23. 23.50% of 160 =
  24. 24.15% of 260 =
  25. 25.10% of 500 =
  26. 26.10% of 280 =
  27. 27.1% of 530 =
  28. 28.5% of 510 =
  29. 29.15% of 840 =
  30. 30.25% of 150 =
  31. 31.20% of 890 =
  32. 32.10% of 450 =
  33. 33.5% of 30 =
  34. 34.1% of 570 =
  35. 35.50% of 660 =
  36. 36.20% of 20 =
  37. 37.20% of 610 =
  38. 38.5% of 820 =
  39. 39.10% of 490 =
  40. 40.5% of 210 =

Answer key

  1. 9
  2. 130
  3. 108
  4. 40
  5. 2
  6. 0.4
  7. 42
  8. 340
  9. 154
  10. 4
  11. 197.5
  12. 4
  13. 27.5
  14. 170
  15. 3
  16. 435
  17. 90
  18. 55
  19. 36
  20. 109.5
  21. 8
  22. 14
  23. 80
  24. 39
  25. 50
  26. 28
  27. 5.3
  28. 25.5
  29. 126
  30. 37.5
  31. 178
  32. 45
  33. 1.5
  34. 5.7
  35. 330
  36. 4
  37. 122
  38. 41
  39. 49
  40. 10.5

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