-47.62% is the change from 819 to 429
Calculation steps:
[( 429 - 819 ) ÷ 819] x 100 = -47.62%
Formula
Percentage change = [(429 - 819) / 819] x 100
Subtract the new number by the original number
429 - 819 = -390
-390 ÷ 819 = -0.47619047619047616
-0.47619047619047616 x 100 = -47.62%