23,90*15/16
\({\color{red}23.90\cdot\frac{15}{16}}=\frac{239}{10}\cdot\frac{15}{16}=\frac{239\cdot3\cdot5}{5\cdot32}\\ \color{blue}=\frac{717}{32}=22\frac{13}{32}=22.40625\)
!
!
