Lauren H. answered 11/11/18
Experienced High School Chemistry Teacher
You've written an expression, but not an equation. I will make it into an equation...
1/4y+3/8 (expression)
1/4y+3/8 = 0 (equation)
Now it can be simplified/solved
1/4y+3/8 = 0
(1/4)y = -3/8
Multiply both sides by 4:
y = -12/8 = -3/2