The fraction 5/7 written as a decimal is 0.714285.
If it is recurring 3 then as a fraction it is 7/3 and it is already expressed as a decimal
0.4285714...
7/3
If you mean 3 and 7/8 then as a decimal it is 3.875 and as a fraction it is 31/8
0.28
.6363636363...
1.25
It is 0.7
It is: 0.7 repeating 7
7 and 3/8 = 59/8 as a fraction or 7.375 as a decimal
5/7 is in simplified form as a fraction, but as a decimal, it is approximately .7143.