Whose sequence proves triangle ABC is congruent to triangle DEF? Why?

The transitive property of equality states that: o if a = b, then bra o if a = b, then ac = bc o if a = b and b= c, then a = if a = b and c= c, then a + b = b + c

Which of the following will form the composite function?

How do i take any fraction and make it into a decimal or percentage?