Student pilot here. I thought I was smarter than this, I’m struggling with this concept. I got the ASA test prep book and there’s a question asking what happens to the indicated altitude when the altimeter setting is changed from 29.15 to 29.85. Answer is indicated altitude increases by 700 feet. Ok, makes sense.
But then I’m reading the aircraft performance chapter in the Aeronautical Knowledge book. It has a chart about finding pressure altitude, and when the altimeter setting decreases on this chart the altitude increases. So, the converse of the concept in the question. I can make either make sense on its own but they seem to contradict each other. What am I missing?