1. Proportional Difference and Absolute Difference

Hi, I want to make sure I am understanding the terms 'proportional difference' and 'absolute difference' correctly. Here's an example question with my thinking - I'd greatly appreciate someone double-checking my working

Table showing percentage of university & pre-school students fitting into particular category

Question 1: Excluding Cat A and Cat B, which Category showed the greatest proportional difference between University and Pre-School

My answer: I read this to mean what is the greatest ratio of University:Pre-School so i looked at:

To me, the answer is Cat D. Am i right or way off the mark?

Question 2: Looking at the whole sample, which category, excluding Cat G, showed the smallest absolute difference between University and Pre-School

Again, to me, this is asking "what are the raw numbers and what is the smallest difference?"

So isnt this just Cat F - you can tell by looking at the chart but if not, my working would be turing everything into numbers and getting: