-99.35% is the change from 306 to 2
Calculation steps:
[( 2 - 306 ) ÷ 306] x 100 = -99.35%
Formula
Percentage change = [(2 - 306) / 306] x 100
Subtract the new number by the original number
2 - 306 = -304
-304 ÷ 306 = -0.9934640522875817
-0.9934640522875817 x 100 = -99.35%