Is there a linguistic convention regarding whether to mention initial or current value first when describing change?
I believe analysis of retentioncognitive processing (retention, attention and retrieval) demands during reading would recommend mentioning the initial value first. (The price of bread changed from $1 to $2) because it facilitates constructing a model as you read. Requirement to keep final value in memory until initial value is read might increase reading difficulty/comprehension.
However, "The price of bread changed to $2 from $1" seems equally common in current newspapers and magazines.