-49.35% is the change from 308 to 156
Calculation steps:
[( 156 - 308 ) ÷ 308] x 100 = -49.35%
Formula
Percentage change = [(156 - 308) / 308] x 100
Subtract the new number by the original number
156 - 308 = -152
-152 ÷ 308 = -0.4935064935064935
-0.4935064935064935 x 100 = -49.35%