Jareline and jackie went to brunch at 1145am. if they left the restaurant at 112pm how long did they spend at the restaurant

In this case, we need to count up by hours and minutes. 

Simple, in my opinion.

So, 11:45 to 1:12

12:45 is one hour. Now, 1:00 is another 15 minutes, so we now have 1 hour and 15 minutes.

And then, it is another 12 minutes from 1:00 to 1:12.

15 + 12 = 27

They spent 1 hour and 27 minutes at the restaurant.

Glad I could help, and good luck!