WORTH 1O POINTS!!

Reduce each fraction to the lowest terms to determine if the ratios form a proportion. Show your work and explain. ( These are fractions btw. ) (1.) 1/4 , 3/12 (2) 18/24,15/20 (3.) 2/5,30/80 (4.) 33/63,26/42 (5.) 54/10,81/15

x/x is a fraction

Please explain how to show work for each problem!! I had to do this assignment last week but now I have to make it up quickly thank you​​