Determine Ratio of a to B $A = 4$ And $B = 28$

Determine ratio of A to B. Round as indicated.
- $A = 4$ and $B = 28$ (Do not round.)

A) 7
B) $\frac { 1 } { 7 }$
C) $\frac { 4 } { 7 }$
D) 4