Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=12$, $b=100$ e $a/b=\frac{12}{100}$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=-3$, $b=g$, $c=3$, $a/b=\frac{-3}{g}$, $f=25$, $c/f=\frac{3}{25}$ e $a/bc/f=\frac{3}{25}\frac{-3}{g}$

Applicare la formula: $ab$$=ab$, dove $ab=-3\cdot 3$, $a=-3$ e $b=3$