-99.68% is the change from 308 to 1
Calculation steps:
[( 1 - 308 ) ÷ 308] x 100 = -99.68%
Formula
Percentage change = [(1 - 308) / 308] x 100
Subtract the new number by the original number
1 - 308 = -307
-307 ÷ 308 = -0.9967532467532467
-0.9967532467532467 x 100 = -99.68%