One-ninth of all sales at a local Subway is for cash. If cash sales for the week were $690, what were Subways total sales? This one is not clear. I know i am missing something here. I think the answer is $6,210. So how would i write it out?
let the Cash be C..
C=$690

Question

One-ninth of all sales at a local Subway is for cash. If cash sales for the week were $690, what were Subways total sales? This one is not clear. I know i am missing something here. I think the answer is $6,210. So how would i write it out? 
let the Cash be C.. 
C=$690

anonymous · Answer

690=1/9S where S is the total sales.
Multiply both sides by 9 to get S.
690 * 9 = S
$6,210 = S.