-47.68% is the change from 820 to 429
Calculation steps:
[( 429 - 820 ) ÷ 820] x 100 = -47.68%
Formula
Percentage change = [(429 - 820) / 820] x 100
Subtract the new number by the original number
429 - 820 = -391
-391 ÷ 820 = -0.4768292682926829
-0.4768292682926829 x 100 = -47.68%