evaluate and if possible simplify x-5/15 for x=-5

18/-35 divide by 22/25

x-5/15 for x=-5

= -5 - 1/3
= -15/3 - 1/3
= -16/3

(18/-35) ÷(22/25)
= (18/-35)(25/22)
= 450/-770
= -45/77