5 and 3/8*10-7.5
5 and 3/8*10-7.5,
If I understand what you want, then it should be written like this:
(5 3/8) X (10 - 7.5)
(43/8) X( 2 1/2)
(43/8 X (5/2)
215/16=13 7/16