-47.75% is the change from 821 to 429
Calculation steps:
[( 429 - 821 ) ÷ 821] x 100 = -47.75%
Formula
Percentage change = [(429 - 821) / 821] x 100
Subtract the new number by the original number
429 - 821 = -392
-392 ÷ 821 = -0.4774665042630938
-0.4774665042630938 x 100 = -47.75%