How do figure out 120/f = 1.2?
\(\frac{120}{f} = 1.2 \ \ /*f\\ \\f eq 0 \\ \\120=1.2f \ \ / *10\\ \\120*10=1.2*10*f \\ \\1200=12f /:12\\ \\ f=\frac{1200}{12}\\ \\f=100\)
1.2 x 120 = 100f = 100
