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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 427 · 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. 1.25% of 570 =
  2. 2.50% of 680 =
  3. 3.25% of 360 =
  4. 4.50% of 520 =
  5. 5.1% of 540 =
  6. 6.5% of 270 =
  7. 7.25% of 750 =
  8. 8.25% of 820 =
  9. 9.15% of 90 =
  10. 10.15% of 680 =
  11. 11.10% of 160 =
  12. 12.5% of 870 =
  13. 13.10% of 420 =
  14. 14.50% of 900 =
  15. 15.50% of 470 =
  16. 16.50% of 600 =
  17. 17.1% of 710 =
  18. 18.1% of 50 =
  19. 19.50% of 660 =
  20. 20.15% of 570 =
  21. 21.50% of 760 =
  22. 22.10% of 890 =
  23. 23.15% of 820 =
  24. 24.50% of 400 =
  25. 25.15% of 110 =
  26. 26.10% of 840 =
  27. 27.20% of 700 =
  28. 28.15% of 730 =
  29. 29.1% of 840 =
  30. 30.15% of 280 =
  31. 31.50% of 90 =
  32. 32.50% of 680 =
  33. 33.20% of 240 =
  34. 34.20% of 20 =
  35. 35.25% of 400 =
  36. 36.15% of 100 =
  37. 37.10% of 380 =
  38. 38.15% of 820 =
  39. 39.25% of 100 =
  40. 40.10% of 450 =

Answer key

  1. 142.5
  2. 340
  3. 90
  4. 260
  5. 5.4
  6. 13.5
  7. 187.5
  8. 205
  9. 13.5
  10. 102
  11. 16
  12. 43.5
  13. 42
  14. 450
  15. 235
  16. 300
  17. 7.1
  18. 0.5
  19. 330
  20. 85.5
  21. 380
  22. 89
  23. 123
  24. 200
  25. 16.5
  26. 84
  27. 140
  28. 109.5
  29. 8.4
  30. 42
  31. 45
  32. 340
  33. 48
  34. 4
  35. 100
  36. 15
  37. 38
  38. 123
  39. 25
  40. 45

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