2/3*(0,72:12/25)+5/10

2/3 x ( 72/100 x 25/12 ) + 5/10
2/3 x 6/4 + 5/10
2/2+5/10= 10/10+5/10= 15/10=1 5/10= 1 1/2

jawabannya , sorry klo belepotan