Hey everyone, how do i sum up all the fractions in a loop in python : Id like to calculate the sum of the following numbers using a loop

1/3 + 3/5 + 5/7 + . . . + 95/97 + 97/99

Print the sum

So far this is what I wrote but I could only get it to print the fractions

    s = ''
    for j in range(30, 0, -1):
        s += "{}/{} + ".format(31-j, j)
sum = +=j
    print sum

