Answer:
The starting length of ribbon was
yards.
Explanation:
You have used 12 1/2 yards of silver rope. Converting this to improper fraction;
![(25)/(2)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/py04khr53z9zfh5rz2zao1v7r1yxz8z0yh.png)
You have 36 2/3 yards left. Converting this to improper fraction;
![(110)/(3)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/ckd4bdczcsb8gprhk51hmk359ylml98l27.png)
So, in the starting the rope must have been :
![(25)/(2) +(110)/(3)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/dgpwad0kay40rlt8begxj5ji2srpfz562o.png)
LCM of 2 and 3 is 6.
![(75+220)/(6)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/zrb1vrnby0qumip30c5ffg262flfxnlpbl.png)
=
![(295)/(6)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/cdz733qseu5wykzm93f3kio0qs3s1b1vtk.png)
=
![49(1)/(6)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/exjd9hb07vk1w9kloqrupo1iic9vyzsg20.png)
Hence, the starting length of ribbon was
yards.