35% is just 35/100. To compare 3/8 with 35/100, you need to make the denominator of 3/8 into 100. To do this, multiply both he top and the bottom by 12.5. You will get 37.5/100. Now, since the denominators are the same, just compare the numerators. 37.5/100 is greater than 35 so 3/8 is greater than 35%. You could also look at 37.5/100 as 37.5% which is more than 36% and, again, 3/8 is greater than 35%. Hope this helps!
6/8th's would be the answer to this question because 3*2=6 and 4*2=8 so there was 6/8ths to start with. 6/8-3/8= 3/8 there was 3/8th's after she drank the juice.