Operation with rational numbers

Question

At the beginning of the day, the stock market goes up 30 1/2 points. At the end of the day, the stock market goes down 100 3/4 points. What I'd the change from the high to the end of the day?

Answer 1

We have two questions: 1) when was “the high of the day” and 2) what was the net change from the high to the end of the day?

 

Was the high at...

a) the beginning of the day

b) after the market had gone up 30 1/2

c  after the market had dropped 100 3/4 points at end of day?

 

It was at time (b)

 

Now how much did it change from time b to time c?