Just by reading the steps I am lost please if someone can help me i am studying for a quizz on Friday but I want to undestand . All I understand is the meaning I can see any expression multiplied by 1 is equivalent to original expression but I am lost with these questions.

Using Multiplicative identity

what is an example to find equivalent fractions?how to put in lowest term using the concept use another example.last use an example how to find missing parts?