Question

State if each pair of ratios forms a proportion 4/2 and 20/6

Answer 1

4/2 forms a porportion because it is equal to 2
20/6 forms a porportion to 10/3

Answer 2

4/2 forms a proportion because it can be simplified further into 2. 
20/6 forms a proportion because it can be simplified to 10/3