It's a typo.
I came across a question which is:
Now the book states the answer is 64 but I got 6400. Could this be a typo in the book.A man saved $2400 or 37.5% of his daily salary.What was his daily salary.
My method for getting the answer was
(37.5/100).x=2400
so x=6,400
Ay suggestions?