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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 510 · 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. 1.1% of 130 =
  2. 2.20% of 380 =
  3. 3.1% of 80 =
  4. 4.20% of 130 =
  5. 5.15% of 610 =
  6. 6.5% of 110 =
  7. 7.25% of 810 =
  8. 8.10% of 160 =
  9. 9.1% of 460 =
  10. 10.20% of 30 =
  11. 11.20% of 740 =
  12. 12.10% of 630 =
  13. 13.10% of 140 =
  14. 14.15% of 430 =
  15. 15.10% of 120 =
  16. 16.5% of 270 =
  17. 17.25% of 390 =
  18. 18.1% of 690 =
  19. 19.5% of 640 =
  20. 20.1% of 600 =
  21. 21.50% of 660 =
  22. 22.10% of 630 =
  23. 23.15% of 250 =
  24. 24.5% of 60 =
  25. 25.1% of 790 =
  26. 26.10% of 90 =
  27. 27.20% of 280 =
  28. 28.20% of 70 =
  29. 29.10% of 900 =
  30. 30.25% of 720 =
  31. 31.5% of 170 =
  32. 32.10% of 810 =
  33. 33.10% of 320 =
  34. 34.20% of 830 =
  35. 35.25% of 790 =
  36. 36.10% of 430 =
  37. 37.15% of 720 =
  38. 38.15% of 710 =
  39. 39.50% of 110 =
  40. 40.25% of 430 =

Answer key

  1. 1.3
  2. 76
  3. 0.8
  4. 26
  5. 91.5
  6. 5.5
  7. 202.5
  8. 16
  9. 4.6
  10. 6
  11. 148
  12. 63
  13. 14
  14. 64.5
  15. 12
  16. 13.5
  17. 97.5
  18. 6.9
  19. 32
  20. 6
  21. 330
  22. 63
  23. 37.5
  24. 3
  25. 7.9
  26. 9
  27. 56
  28. 14
  29. 90
  30. 180
  31. 8.5
  32. 81
  33. 32
  34. 166
  35. 197.5
  36. 43
  37. 108
  38. 106.5
  39. 55
  40. 107.5

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