Respuesta :

Billymkhoi
81.42
= 81+ 0.42
= 81+ 42/100
= 81+ (42/2) / (100/2)
= 81+ 21/50
= 81 21/50

The final answer is 81 21/50~
Leader
[tex]81.42 =81 \frac{42}{100}=81\frac{21\times 2}{50\times 2} = \boxed{\bf{81\frac{21}{50}}}[/tex]