16/8=2/1=2
so just factor out the ones so for example
4/8=1/2 because 1/2 times 4/4=4/8 and 1/2 times 4/4=1/2 times 1=1/2
so 16/8=
factor
16=2 times 2 times 2 times 2
8= 2 times 2 times 2
16/8=2/1 times 2/2 times 2/2 times 2/2=2/1 times 1 times 1 times 1=2/1=2