What the statement above is saying is the following:
(3/4)n = 5/8
Solve for n.
3n/4 = 5/8
Is another way to write the above statement.
Multiply 4 on both sides.
3n = (5*4)/8
3n = 20/8
Divide 3 on both sides to solve for n.
n = (20/8)/3
n = (20/8*3)
n = 20/24
Simplify!
n = 5/6