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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 701 · 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 380 =
  2. 2.15% of 50 =
  3. 3.5% of 890 =
  4. 4.5% of 890 =
  5. 5.1% of 340 =
  6. 6.5% of 710 =
  7. 7.15% of 220 =
  8. 8.50% of 700 =
  9. 9.20% of 70 =
  10. 10.15% of 540 =
  11. 11.50% of 450 =
  12. 12.10% of 220 =
  13. 13.15% of 190 =
  14. 14.25% of 860 =
  15. 15.25% of 400 =
  16. 16.20% of 830 =
  17. 17.15% of 180 =
  18. 18.10% of 530 =
  19. 19.1% of 250 =
  20. 20.5% of 210 =
  21. 21.15% of 860 =
  22. 22.15% of 620 =
  23. 23.15% of 380 =
  24. 24.25% of 50 =
  25. 25.5% of 230 =
  26. 26.5% of 590 =
  27. 27.15% of 390 =
  28. 28.50% of 60 =
  29. 29.5% of 30 =
  30. 30.50% of 390 =
  31. 31.5% of 20 =
  32. 32.5% of 800 =
  33. 33.20% of 870 =
  34. 34.50% of 160 =
  35. 35.5% of 90 =
  36. 36.10% of 260 =
  37. 37.5% of 510 =
  38. 38.25% of 690 =
  39. 39.15% of 790 =
  40. 40.50% of 770 =

Answer key

  1. 57
  2. 7.5
  3. 44.5
  4. 44.5
  5. 3.4
  6. 35.5
  7. 33
  8. 350
  9. 14
  10. 81
  11. 225
  12. 22
  13. 28.5
  14. 215
  15. 100
  16. 166
  17. 27
  18. 53
  19. 2.5
  20. 10.5
  21. 129
  22. 93
  23. 57
  24. 12.5
  25. 11.5
  26. 29.5
  27. 58.5
  28. 30
  29. 1.5
  30. 195
  31. 1
  32. 40
  33. 174
  34. 80
  35. 4.5
  36. 26
  37. 25.5
  38. 172.5
  39. 118.5
  40. 385

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