Year-on-year comparison is based on the concept of "statistical period"

Compared with the "last statistical period", it is called "ring comparison"

Compared with last year's "statistical period", it is called "year-on-year". The reason why we say "last year" here is that one year is a relatively suitable length of time and can reflect the general development trend.

Of course, if due to the particularity of the analysis object, it is necessary to analyze every day of the week with a week as the analysis cycle, then it can also be said that this Tuesday is a month-on-month comparison with Monday, and last Tuesday was a year-on-year comparison.

In a word, everything depends on your choice during the statistical period.

The first empty answer: (166.42-142.44)/142.44 *100% =17%.