-32.4% is the change from 821 to 555
Calculation steps:
[( 555 - 821 ) ÷ 821] x 100 = -32.4%
Formula
Percentage change = [(555 - 821) / 821] x 100
Subtract the new number by the original number
555 - 821 = -266
-266 ÷ 821 = -0.32399512789281365
-0.32399512789281365 x 100 = -32.4%