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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 723 · 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. 1.15% of 90 =
  2. 2.50% of 70 =
  3. 3.20% of 880 =
  4. 4.10% of 160 =
  5. 5.20% of 680 =
  6. 6.20% of 470 =
  7. 7.1% of 270 =
  8. 8.50% of 490 =
  9. 9.15% of 390 =
  10. 10.15% of 110 =
  11. 11.25% of 780 =
  12. 12.1% of 20 =
  13. 13.1% of 800 =
  14. 14.25% of 390 =
  15. 15.10% of 250 =
  16. 16.1% of 50 =
  17. 17.15% of 660 =
  18. 18.5% of 290 =
  19. 19.1% of 490 =
  20. 20.10% of 350 =
  21. 21.25% of 840 =
  22. 22.25% of 160 =
  23. 23.1% of 230 =
  24. 24.15% of 70 =
  25. 25.25% of 260 =
  26. 26.1% of 300 =
  27. 27.50% of 20 =
  28. 28.1% of 470 =
  29. 29.20% of 210 =
  30. 30.1% of 180 =
  31. 31.15% of 80 =
  32. 32.1% of 770 =
  33. 33.5% of 230 =
  34. 34.50% of 60 =
  35. 35.20% of 90 =
  36. 36.25% of 160 =
  37. 37.1% of 510 =
  38. 38.25% of 380 =
  39. 39.10% of 830 =
  40. 40.20% of 820 =

Answer key

  1. 13.5
  2. 35
  3. 176
  4. 16
  5. 136
  6. 94
  7. 2.7
  8. 245
  9. 58.5
  10. 16.5
  11. 195
  12. 0.2
  13. 8
  14. 97.5
  15. 25
  16. 0.5
  17. 99
  18. 14.5
  19. 4.9
  20. 35
  21. 210
  22. 40
  23. 2.3
  24. 10.5
  25. 65
  26. 3
  27. 10
  28. 4.7
  29. 42
  30. 1.8
  31. 12
  32. 7.7
  33. 11.5
  34. 30
  35. 18
  36. 40
  37. 5.1
  38. 95
  39. 83
  40. 164

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