-46.89% is the change from 821 to 436
Calculation steps:
[( 436 - 821 ) ÷ 821] x 100 = -46.89%
Formula
Percentage change = [(436 - 821) / 821] x 100
Subtract the new number by the original number
436 - 821 = -385
-385 ÷ 821 = -0.4689403166869671
-0.4689403166869671 x 100 = -46.89%