I’m trying to square how only [15% of oil price controls](https://www.nytimes.com/1981/01/29/us/president-abolishes-la...) remained when Reagan single handedly saved the day. Seems like Carter spent 4 years doing the hard work and Reagan was able to capitalize on the last bit, which as the article states, Carter would have accomplished by spring.
Btw, the oil price controls were a Nixon initiative, continued by Ford. Carter did not invent them, he just didn't remove them.
Reagan was the beneficiary of the collapse of the OPEC price war internationally.