A Third of the Angels Who Fell

Since 1/3 of the angels fell, how many are there, and what are those fallen angels doing now on earth? [2 Peter 2:4, Jude 1:6, Revelation 12:4, Daniel 8:10, Isaiah 14:13, Obadiah 1:4, Matthew 11:23, Daniel 12:3, 2 Peter 1:3, Ephesians 6:12, Acts 1:7].