-62.1% is the change from 847 to 321
Calculation steps:
[( 321 - 847 ) ÷ 847] x 100 = -62.1%
Formula
Percentage change = [(321 - 847) / 847] x 100
Subtract the new number by the original number
321 - 847 = -526
-526 ÷ 847 = -0.6210153482880756
-0.6210153482880756 x 100 = -62.1%