How do you solve this 990 922 7520Solution099

How do you solve this?

(.99/_0 - .92/_-2) / (.75/_-20)

(0.99<0 - 0.92< -2) /(0.75<-20)

Assuming angles are in deg

0.99<0 = 0.99 ;

0.92< -2 = 0.92(cos2 -isin2) =0.9194 -i0.032

0.75<-20 = 0.75( cos(-20) + isin(-20) ) = 0.705 - i*0.34

(0.99<0 - 0.92< -2) /(0.75<-20) = ( 0.99 - ( 0.9194 -i*0.032) /(0.075 -i*0.34)

= ( 0.0706 + i*0.032)/(0.075 -i*0.34)

= 0.0775<24.38/ 0.348<-77.56

= 0.22<101.94