-51.37% is the change from 658 to 320
Calculation steps:
[( 320 - 658 ) ÷ 658] x 100 = -51.37%
Formula
Percentage change = [(320 - 658) / 658] x 100
Subtract the new number by the original number
320 - 658 = -338
-338 ÷ 658 = -0.513677811550152
-0.513677811550152 x 100 = -51.37%