Help with Math

\(\frac{4}{7}*(-28)=-\frac{4*28}{7}=-\frac{4*4}{1}=-\frac{16}{1}=-16\)

 

.

4/7 x k = -28

k = -28 x 7/4

k = -49

 

or

 

 

4/(7 x k) = -28

4 = -196k

-4/196 = k

k = -.020408