-96.09% is the change from 307 to 12
Calculation steps:
[( 12 - 307 ) ÷ 307] x 100 = -96.09%
Formula
Percentage change = [(12 - 307) / 307] x 100
Subtract the new number by the original number
12 - 307 = -295
-295 ÷ 307 = -0.9609120521172638
-0.9609120521172638 x 100 = -96.09%