first denominoator times whole number which is 4 and 6, then 8 and 2 then after you got the answer to that just add it to the numerator and keep the denominator same and turn it into multiplication and the second number has to switch for example 2/4 switch to 4/2
4*6= 24+3= 27/4* 8*2=16+5=21/8= 8/21 so 27/4*8/21 then cross divide so 9/1*2/7= 18/7= 2 4/7 is the answer
