At Google, expectations are scaled for part-time employees. In other words, a 60%/80% part-timer is expected to do 60%/80% as much as a full-timer at the same level.
Source: I work part-time at Google (https://news.ycombinator.com/item?id=17133830)
Source: I work part-time at Google (https://news.ycombinator.com/item?id=17133830)
That's why in practice google's famous "20% time" is 120% time and on other hand it also has a lot of coasters working at half pace while cashing in 100% pay.