Will answer correctly in comments but I need to know if the question is
seventeen over eight X twenty one
(17/8 x 21/3 = 22 2/5)
Or
One and seven over eight X two and one over five
(1 7/8 x 2 1/3 = 22 2/5)
It looked like there was some specific spacing so I don’t really know how to respond yet.
