HP 33s - Manual (Page 71)

Real–Number Functions 4–7
›
 )
 Total cost (base price + 6% tax).
Suppose that the $15.76 item cost $16.12 last year. What is the percentage
change from last year's price to this year's?
Keys: Display: Description:
16.12 ‘
 )
15.76 | T
.) This year's price dropped about
2.2% from last year's price.
{%} 4 .) Restores FIX 4 format.
Note
The order of the two numbers is important for the %CHG function.
The order affects whether the percentage change is considered
positive or negative.