-60.71% is the change from 817 to 321
Calculation steps:
[( 321 - 817 ) ÷ 817] x 100 = -60.71%
Formula
Percentage change = [(321 - 817) / 817] x 100
Subtract the new number by the original number
321 - 817 = -496
-496 ÷ 817 = -0.6070991432068543
-0.6070991432068543 x 100 = -60.71%