-95.78% is the change from 308 to 13
Calculation steps:
[( 13 - 308 ) ÷ 308] x 100 = -95.78%
Formula
Percentage change = [(13 - 308) / 308] x 100
Subtract the new number by the original number
13 - 308 = -295
-295 ÷ 308 = -0.9577922077922078
-0.9577922077922078 x 100 = -95.78%