120 90 = 12 9 = 4 3 . {\displaystyle {\frac {120}{90}}={\frac {12}{9}}={\frac {4}{3}}\,.} In the first step both numbers were divided by 10, which is a factor common to both 120 and 90.
120 90 = 12 9 = 4 3 . {\displaystyle {\frac {120}{90}}={\frac {12}{9}}={\frac {4}{3}}\,.} No primeiro paso dividíronse ambos os números entre 10, factor común de 120 e 90.