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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 584 · 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 420 =
  2. 2.15% of 400 =
  3. 3.1% of 890 =
  4. 4.25% of 90 =
  5. 5.1% of 30 =
  6. 6.20% of 390 =
  7. 7.20% of 340 =
  8. 8.10% of 30 =
  9. 9.5% of 570 =
  10. 10.20% of 60 =
  11. 11.25% of 200 =
  12. 12.50% of 550 =
  13. 13.20% of 90 =
  14. 14.20% of 710 =
  15. 15.25% of 70 =
  16. 16.25% of 200 =
  17. 17.20% of 490 =
  18. 18.25% of 530 =
  19. 19.20% of 600 =
  20. 20.25% of 480 =
  21. 21.25% of 240 =
  22. 22.5% of 330 =
  23. 23.20% of 850 =
  24. 24.20% of 190 =
  25. 25.1% of 170 =
  26. 26.20% of 880 =
  27. 27.20% of 150 =
  28. 28.50% of 140 =
  29. 29.50% of 400 =
  30. 30.1% of 870 =
  31. 31.20% of 650 =
  32. 32.10% of 850 =
  33. 33.1% of 40 =
  34. 34.5% of 740 =
  35. 35.25% of 310 =
  36. 36.25% of 270 =
  37. 37.20% of 410 =
  38. 38.10% of 720 =
  39. 39.50% of 160 =
  40. 40.15% of 440 =

Answer key

  1. 63
  2. 60
  3. 8.9
  4. 22.5
  5. 0.3
  6. 78
  7. 68
  8. 3
  9. 28.5
  10. 12
  11. 50
  12. 275
  13. 18
  14. 142
  15. 17.5
  16. 50
  17. 98
  18. 132.5
  19. 120
  20. 120
  21. 60
  22. 16.5
  23. 170
  24. 38
  25. 1.7
  26. 176
  27. 30
  28. 70
  29. 200
  30. 8.7
  31. 130
  32. 85
  33. 0.4
  34. 37
  35. 77.5
  36. 67.5
  37. 82
  38. 72
  39. 80
  40. 66

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