-49.82% is the change from 821 to 412
Calculation steps:
[( 412 - 821 ) ÷ 821] x 100 = -49.82%
Formula
Percentage change = [(412 - 821) / 821] x 100
Subtract the new number by the original number
412 - 821 = -409
-409 ÷ 821 = -0.4981729598051157
-0.4981729598051157 x 100 = -49.82%