Answer: 8 shirts for 128 shekels
Explanation:
First, we can set up fractions and simplify to find the cost of one shirt.
5shirts/100shekels = 1shirt/20 shekels
8 shirts/128 shekels = 1shirt/16 shekels
Ultimately, whichever cost per shirt is lower is going to be the better buy. Since 16shekels/shirt is less than 20shekels/shirt, you are ultimately buying more shirts for a lower cost. Hope this helps