4 over 10 in simplest form would be 2 over 5.
10/13 is the simplest form.
10/20 in simplest form is 1/2
27/10 as an improper fraction is already in its simplest form
9/10
7/10 IS in the simplest form if it's a fraction. If decimals, it would be 0.7
10/11
5/19
10/17
10/26 = 5/13
10/15 = 2/3
10 out of 100 in simplest form is 1/10
2/5