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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 518 · 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. 1.10% of 700 =
  2. 2.5% of 150 =
  3. 3.25% of 570 =
  4. 4.5% of 170 =
  5. 5.50% of 370 =
  6. 6.15% of 770 =
  7. 7.5% of 690 =
  8. 8.5% of 570 =
  9. 9.1% of 540 =
  10. 10.5% of 430 =
  11. 11.20% of 220 =
  12. 12.1% of 260 =
  13. 13.50% of 740 =
  14. 14.1% of 210 =
  15. 15.1% of 880 =
  16. 16.15% of 790 =
  17. 17.15% of 150 =
  18. 18.15% of 870 =
  19. 19.15% of 20 =
  20. 20.5% of 420 =
  21. 21.5% of 890 =
  22. 22.50% of 510 =
  23. 23.20% of 900 =
  24. 24.5% of 880 =
  25. 25.1% of 780 =
  26. 26.20% of 750 =
  27. 27.20% of 20 =
  28. 28.10% of 200 =
  29. 29.5% of 890 =
  30. 30.5% of 450 =
  31. 31.20% of 340 =
  32. 32.5% of 800 =
  33. 33.5% of 60 =
  34. 34.20% of 380 =
  35. 35.15% of 300 =
  36. 36.50% of 660 =
  37. 37.25% of 840 =
  38. 38.15% of 880 =
  39. 39.50% of 20 =
  40. 40.10% of 750 =

Answer key

  1. 70
  2. 7.5
  3. 142.5
  4. 8.5
  5. 185
  6. 115.5
  7. 34.5
  8. 28.5
  9. 5.4
  10. 21.5
  11. 44
  12. 2.6
  13. 370
  14. 2.1
  15. 8.8
  16. 118.5
  17. 22.5
  18. 130.5
  19. 3
  20. 21
  21. 44.5
  22. 255
  23. 180
  24. 44
  25. 7.8
  26. 150
  27. 4
  28. 20
  29. 44.5
  30. 22.5
  31. 68
  32. 40
  33. 3
  34. 76
  35. 45
  36. 330
  37. 210
  38. 132
  39. 10
  40. 75

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