well put it in percentage
so you know 30 % is the same so then do
0.1 and that is 1/10 and that is also 10/100
also there is 1/100 is out of 100 %
so that means that 0.1 is 10 %
and 1/5 is the same as 2/10 and the same as 20/100 also the same as 20%
so the oder is 0.1 , 1/5 , 30%
