Rename each fraction as a decimal.

Just cary out the division.....here is how the forst one works

7/8  = 7 divided by 8 ===  .875 

I think you can figure out how to complete the other two Q's !

Note....if the denominator is a divisor  of 100, we can do this...

3 / 5    multiply  numerator  /  denominator by 20

60 / 100   =     60%   =   .60

And

11 / 20    multiply numerator / demoninator  by  5

55 / 100   =  55%   =  .55