The weather is 0 days.

Weather conditions: sunny for 3 days, cloudy for 2 days, cloudy for 0 days and rainy for 0 days? * * * Five days

Three sunny days account for the survey days: 3÷5=3/5, that is, three fifths.

Note: There are seven days in a week and only five days in a working day.

There are three sunny days, and the proportion of sunny days in a week should be three-sevenths.