Jawabanmu

2014-08-17T20:40:05+07:00
45 x 1/5 = 9 cm
45 cm-9cm = 36 cm
perbandingan = 9 : 36
                     = 1 : 4
2014-08-17T20:45:51+07:00
Panjang kawat 45=
45:5=9
45-9=36
9:36=
1:4