← Percentages in seconds lesson New set →

Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 364 · 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 790 =
  2. 2.50% of 40 =
  3. 3.50% of 340 =
  4. 4.10% of 690 =
  5. 5.1% of 270 =
  6. 6.5% of 280 =
  7. 7.20% of 720 =
  8. 8.10% of 850 =
  9. 9.20% of 20 =
  10. 10.50% of 890 =
  11. 11.15% of 80 =
  12. 12.10% of 150 =
  13. 13.15% of 570 =
  14. 14.5% of 270 =
  15. 15.25% of 110 =
  16. 16.15% of 200 =
  17. 17.5% of 670 =
  18. 18.25% of 260 =
  19. 19.50% of 550 =
  20. 20.20% of 770 =
  21. 21.15% of 100 =
  22. 22.50% of 160 =
  23. 23.10% of 780 =
  24. 24.10% of 470 =
  25. 25.15% of 740 =
  26. 26.25% of 370 =
  27. 27.15% of 680 =
  28. 28.20% of 820 =
  29. 29.15% of 200 =
  30. 30.1% of 240 =
  31. 31.10% of 220 =
  32. 32.50% of 170 =
  33. 33.50% of 610 =
  34. 34.25% of 650 =
  35. 35.1% of 530 =
  36. 36.10% of 160 =
  37. 37.50% of 800 =
  38. 38.10% of 240 =
  39. 39.15% of 760 =
  40. 40.1% of 140 =

Answer key

  1. 79
  2. 20
  3. 170
  4. 69
  5. 2.7
  6. 14
  7. 144
  8. 85
  9. 4
  10. 445
  11. 12
  12. 15
  13. 85.5
  14. 13.5
  15. 27.5
  16. 30
  17. 33.5
  18. 65
  19. 275
  20. 154
  21. 15
  22. 80
  23. 78
  24. 47
  25. 111
  26. 92.5
  27. 102
  28. 164
  29. 30
  30. 2.4
  31. 22
  32. 85
  33. 305
  34. 162.5
  35. 5.3
  36. 16
  37. 400
  38. 24
  39. 114
  40. 1.4

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths