Question

write the fraction with the greatest value 7/10, 1/5, 9/10

Answer 1

7/10=70%
1/5=2/10=20%
9/10=90%   ;)

Answer 2

If you are asking for the order of fractions from greatest to least then
9/10,7/10 then 1/5, if you are just asking for the greatest fraction then it is 9/10
or
9/10= 90%
7/10=70%
1/5=20%
Hope I helped!