Question

encontre a fracao geraria a)0,212121... B) 0,725 c) 2,3757575...

Answer 1

$a)\ 0,212121...= \frac{21^{:3}}{99_{:3}}= \frac{7}{33} \\ \\ \\b)\ 0,725 =\frac{725^{:25}}{1000_{:25}}= \frac{29}{40} \\ \\ \\c)\ 2,3757575... = \frac{2375-23}{990}= \frac{2352^{:6}}{990_{:6}}= \frac{392}{165}$