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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 484 · 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. 1.20% of 420 =
  2. 2.5% of 230 =
  3. 3.10% of 250 =
  4. 4.10% of 240 =
  5. 5.20% of 40 =
  6. 6.25% of 510 =
  7. 7.5% of 80 =
  8. 8.15% of 850 =
  9. 9.20% of 260 =
  10. 10.25% of 130 =
  11. 11.1% of 780 =
  12. 12.25% of 160 =
  13. 13.10% of 20 =
  14. 14.25% of 570 =
  15. 15.20% of 550 =
  16. 16.1% of 640 =
  17. 17.5% of 480 =
  18. 18.25% of 860 =
  19. 19.25% of 20 =
  20. 20.10% of 90 =
  21. 21.50% of 170 =
  22. 22.50% of 110 =
  23. 23.1% of 550 =
  24. 24.25% of 360 =
  25. 25.10% of 900 =
  26. 26.20% of 360 =
  27. 27.10% of 40 =
  28. 28.20% of 900 =
  29. 29.1% of 340 =
  30. 30.5% of 210 =
  31. 31.5% of 160 =
  32. 32.20% of 150 =
  33. 33.50% of 560 =
  34. 34.10% of 770 =
  35. 35.5% of 280 =
  36. 36.10% of 420 =
  37. 37.20% of 90 =
  38. 38.20% of 520 =
  39. 39.5% of 780 =
  40. 40.50% of 120 =

Answer key

  1. 84
  2. 11.5
  3. 25
  4. 24
  5. 8
  6. 127.5
  7. 4
  8. 127.5
  9. 52
  10. 32.5
  11. 7.8
  12. 40
  13. 2
  14. 142.5
  15. 110
  16. 6.4
  17. 24
  18. 215
  19. 5
  20. 9
  21. 85
  22. 55
  23. 5.5
  24. 90
  25. 90
  26. 72
  27. 4
  28. 180
  29. 3.4
  30. 10.5
  31. 8
  32. 30
  33. 280
  34. 77
  35. 14
  36. 42
  37. 18
  38. 104
  39. 39
  40. 60

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