$1$
$a)$ `8,95=895%`
$b)$ `12,6=1260%`
$c)$ `42,6:0,3=142=14200%`
$d)$ `8,15:1,5=5,4333...=543,33%`
$2$
`\frac{45,5}{100}× 2,5=\frac{0,455}{1}× 2,5= 1,1375`
$3$
`\frac{15,39}{100}× 8,1=\frac{0,1539}{1}× 8,1=1,29033`
$4$
`\frac{13,92}{100}× 2,8=\frac{0,1392}{1}×2,8 = 3,18976`
$5$
`\frac{13,92}{4,8}× 100=290`
$6$
`\frac{130,5}{4,5}× 100=2900`