Problem: 18/40=45/?
i have this for homework
Replace the question mark with x, which
represents an unknown value.
18/40 = 45/x
x * (18/40) = x * (45/x)
x(18/40) = 45
40 * x(18/40) = 45 * 40
x(18) = 1800
x(18)/18 = 1800/18
x = 100
The problem statement now
becomes 18/40 = 45/100