-52.14% is the change from 819 to 392
Calculation steps:
[( 392 - 819 ) ÷ 819] x 100 = -52.14%
Formula
Percentage change = [(392 - 819) / 819] x 100
Subtract the new number by the original number
392 - 819 = -427
-427 ÷ 819 = -0.5213675213675214
-0.5213675213675214 x 100 = -52.14%