Answer: 4 8/21
Step by step Explanation:
First convert both 2 5/7 and 1 2/3 into improper fractions.
19/7 and 5/3
Then find their common denominator or their least common multiple.
In this case 3x7=21
Next multiply 19/7 by 3 and 5/3 by 7.
57/21 and 35/21
Now that they have the same denominator just add them together.
57/21+35/21=92/21
Finally simply the improper fraction into a mixed number.
4 8/21
Okay that the answer and step by step explanation to your question. Your welcome.
I hope this helped!