5 over 8
It isn't. 280/8 = 35
70/280 = 1/4
136/280 = 17/35
3 over 8
33/56
9/140
im not sure
5/7
17/35
280% as an improper fraction in its simplest form is 14/5
The expression for 175 is 175, the expression for 280 is 280! Are you sure you meant "expression"?
280/100 = 14/5