-61.19% is the change from 827 to 321
Calculation steps:
[( 321 - 827 ) ÷ 827] x 100 = -61.19%
Formula
Percentage change = [(321 - 827) / 827] x 100
Subtract the new number by the original number
321 - 827 = -506
-506 ÷ 827 = -0.6118500604594922
-0.6118500604594922 x 100 = -61.19%