-99.67% is the change from 307 to 1
Calculation steps:
[( 1 - 307 ) ÷ 307] x 100 = -99.67%
Formula
Percentage change = [(1 - 307) / 307] x 100
Subtract the new number by the original number
1 - 307 = -306
-306 ÷ 307 = -0.996742671009772
-0.996742671009772 x 100 = -99.67%