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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 290 · 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 110 =
  2. 2.25% of 750 =
  3. 3.5% of 340 =
  4. 4.15% of 870 =
  5. 5.10% of 540 =
  6. 6.20% of 470 =
  7. 7.25% of 700 =
  8. 8.50% of 680 =
  9. 9.5% of 580 =
  10. 10.10% of 340 =
  11. 11.15% of 800 =
  12. 12.10% of 60 =
  13. 13.5% of 30 =
  14. 14.1% of 90 =
  15. 15.25% of 750 =
  16. 16.50% of 100 =
  17. 17.1% of 530 =
  18. 18.1% of 210 =
  19. 19.25% of 390 =
  20. 20.10% of 380 =
  21. 21.15% of 220 =
  22. 22.5% of 450 =
  23. 23.10% of 420 =
  24. 24.1% of 520 =
  25. 25.10% of 170 =
  26. 26.10% of 220 =
  27. 27.20% of 440 =
  28. 28.25% of 680 =
  29. 29.25% of 680 =
  30. 30.15% of 250 =
  31. 31.50% of 120 =
  32. 32.10% of 700 =
  33. 33.5% of 210 =
  34. 34.5% of 650 =
  35. 35.5% of 890 =
  36. 36.1% of 870 =
  37. 37.10% of 110 =
  38. 38.5% of 270 =
  39. 39.15% of 520 =
  40. 40.50% of 710 =

Answer key

  1. 27.5
  2. 187.5
  3. 17
  4. 130.5
  5. 54
  6. 94
  7. 175
  8. 340
  9. 29
  10. 34
  11. 120
  12. 6
  13. 1.5
  14. 0.9
  15. 187.5
  16. 50
  17. 5.3
  18. 2.1
  19. 97.5
  20. 38
  21. 33
  22. 22.5
  23. 42
  24. 5.2
  25. 17
  26. 22
  27. 88
  28. 170
  29. 170
  30. 37.5
  31. 60
  32. 70
  33. 10.5
  34. 32.5
  35. 44.5
  36. 8.7
  37. 11
  38. 13.5
  39. 78
  40. 355

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