Question

1 supra 20 * ( 2,31:0,77)

[1,5+1 supra 3 ] : [0,(6)+6,(6) va rog

Answer 1

1/20 * ( 2,31:0,77) =
=1/20 * (231/100:77/100)=
=1/20 *  (231/100 * 100/77)=
=1/20 * 3=3/20

[1,5+1/3 ] : [0,(6)+6,(6)=
=[15/10+1/3 ] : [6/9+(66-6)/9=
=[3/2+1/3 ] : [6/9+(66-6)/9=
=(9+2)/6 : (2/3+60/9)=
=11/6 : (2/3+20/3)=
=11/6 : 22/3=
=11/6 × 3/22=
=1/4=0,25