-62.52% is the change from 819 to 307
Calculation steps:
[( 307 - 819 ) ÷ 819] x 100 = -62.52%
Formula
Percentage change = [(307 - 819) / 819] x 100
Subtract the new number by the original number
307 - 819 = -512
-512 ÷ 819 = -0.6251526251526252
-0.6251526251526252 x 100 = -62.52%