The given expression is
7-y÷5/8
If we substitute y = 1/4 into the expression, it becomes
7 - 1/4 ÷ 5/8
We would simplify the expression by applying the correct order which is known as PEDMAS where
P represents parenthesis
E represents exponent
D represents division
M represents multiplication
A represents addition
S represents subtraction
Thus, we would carry out division first.
1/4 ÷ 5/8
we can change the division sign to multiplication and flip the fraction. It becomes
1/4 * 8/5 = 2/5
The expression becomes
7 - 2/5
= 33/5