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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 469 · 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 550 =
  2. 2.5% of 490 =
  3. 3.5% of 560 =
  4. 4.1% of 300 =
  5. 5.50% of 440 =
  6. 6.25% of 770 =
  7. 7.1% of 510 =
  8. 8.5% of 280 =
  9. 9.50% of 440 =
  10. 10.15% of 610 =
  11. 11.10% of 440 =
  12. 12.25% of 140 =
  13. 13.20% of 30 =
  14. 14.10% of 540 =
  15. 15.50% of 620 =
  16. 16.15% of 740 =
  17. 17.25% of 240 =
  18. 18.10% of 310 =
  19. 19.50% of 900 =
  20. 20.5% of 300 =
  21. 21.5% of 750 =
  22. 22.1% of 180 =
  23. 23.25% of 690 =
  24. 24.5% of 90 =
  25. 25.1% of 530 =
  26. 26.10% of 680 =
  27. 27.50% of 120 =
  28. 28.5% of 500 =
  29. 29.20% of 390 =
  30. 30.50% of 640 =
  31. 31.20% of 440 =
  32. 32.10% of 140 =
  33. 33.10% of 150 =
  34. 34.10% of 510 =
  35. 35.20% of 170 =
  36. 36.5% of 620 =
  37. 37.20% of 840 =
  38. 38.5% of 480 =
  39. 39.50% of 560 =
  40. 40.20% of 770 =

Answer key

  1. 27.5
  2. 24.5
  3. 28
  4. 3
  5. 220
  6. 192.5
  7. 5.1
  8. 14
  9. 220
  10. 91.5
  11. 44
  12. 35
  13. 6
  14. 54
  15. 310
  16. 111
  17. 60
  18. 31
  19. 450
  20. 15
  21. 37.5
  22. 1.8
  23. 172.5
  24. 4.5
  25. 5.3
  26. 68
  27. 60
  28. 25
  29. 78
  30. 320
  31. 88
  32. 14
  33. 15
  34. 51
  35. 34
  36. 31
  37. 168
  38. 24
  39. 280
  40. 154

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