-52.51% is the change from 676 to 321
Calculation steps:
[( 321 - 676 ) ÷ 676] x 100 = -52.51%
Formula
Percentage change = [(321 - 676) / 676] x 100
Subtract the new number by the original number
321 - 676 = -355
-355 ÷ 676 = -0.5251479289940828
-0.5251479289940828 x 100 = -52.51%