Common denominator and strategy 2/3 and 10/15

Their common denominator is 15. Hope it helps! :) If you could vote my answer as the brainliest, that would be awesome! :)

The common denominator of 2/3 and 10/15 is 15.
To go further,
2/3 can be multipled by 5.
So 2 • 5 = 10
And 5 • 3 = 15
Therefore the new fraction is 10/15
When comparing to the 10/15, both of them are equivalent fractions.

Where is the problems