Question: for this code fix the smtax error this is a...

for this code fix the smtax error this is a python code for some reason my code isnt liking my returns and it bring up other symtax error so fix the following code

answer should pop out

the following when runned

1/ 2  + 1/ 3  + 1/ 12   =  11/12

z=' '
def math(x,y):
    global z
    if y==0 or x==0:
        return
    if y%x ==0:
        z=("1/"+str(int(y/x))
        return
     if x%y ==0
        z+=(int(x/y))
    #return
    if x>y:
        z+=(int(x/y)," + ")
        math(x%y,y)
    #return
    a=int(y/x)+1
    z+=("1/"+str(a)+" + ")
    math(int(x*a-y),int(y*a))
x=11
y=12
math(x,y)
print(z,"=",str(x)+"/"+str(y))