$4\frac{1}{2}$= $\frac{9}{2}$= 9: 2 = 4,5
$3\frac{4}{5}$ = $\frac{19}{5}$= 19: 5 = 3,8
$2\frac{3}{4}$ = $\frac{11}{4}$= 11: 4 = 2,75
$1\frac{12}{25}$= $\frac{37}{25}$ = 37: 25 = 1,48
$4\frac{1}{2}$= $\frac{9}{2}$= 9: 2 = 4,5
$3\frac{4}{5}$ = $\frac{19}{5}$= 19: 5 = 3,8
$2\frac{3}{4}$ = $\frac{11}{4}$= 11: 4 = 2,75
$1\frac{12}{25}$= $\frac{37}{25}$ = 37: 25 = 1,48