-46.95% is the change from 820 to 435
Calculation steps:
[( 435 - 820 ) ÷ 820] x 100 = -46.95%
Formula
Percentage change = [(435 - 820) / 820] x 100
Subtract the new number by the original number
435 - 820 = -385
-385 ÷ 820 = -0.4695121951219512
-0.4695121951219512 x 100 = -46.95%