she can hang 27 pieces of artwork
Step-by-step explanation
Step 1
find the total string,
to do that , we need to use an addition
so
total string= yellow screen + green string
replacing we have
Step 2
now, she cuts the total in 1/3 yd, so
we need to make a divison
therefore, she can hang 27 pieces of artwork
I hope this helps you