I setup up a table, with column A coffee drinks, column B no coffee; row 1 dessert, row 2 no dessert

:::::::::::::: Coffee//No Coffee//Total

Dessert...........?...........?.............75

No Dessert......?...........?............. 25

Total..............?..........?..............100

For statement 1, if we assume there are 100 people at the banquet:

We take 60% of 75:

:::::::::::::: Coffee//No Coffee//Total

Dessert...........45...........30.............75

No Dessert......?...........?............. 25

Total..............?..........?..............100

For statement 2: You can pick any almost multiple of 10 for total coffee drinkers, and the chart would still

:::::::::::::: Coffee//No Coffee//Total

Dessert.........27/9.........?............75

No Dessert......3/1........ ?............ 25

Total............30/10.......?............100

However, if you have both info, and you know what that top left corner is, you can figure out what the bottom left no dessert is. Hope this helps, please give kudos for my really graphic intensive tables

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