Refer to the attached image below.
Why do we have to multiply 1yd/3ft in Picture A, while 3ft/1yd in Picture B?
![Refer To The Attached Image Below Why Do We Have To Multiply 1yd3ft In Picture A While 3ft1yd In Picture B class=](https://ph-static.z-dn.net/files/db3/af2bf6e840fce3462e7d5f78c0dceee5.png)