-35.31% is the change from 960 to 621
Calculation steps:
[( 621 - 960 ) ÷ 960] x 100 = -35.31%
Formula
Percentage change = [(621 - 960) / 960] x 100
Subtract the new number by the original number
621 - 960 = -339
-339 ÷ 960 = -0.353125
-0.353125 x 100 = -35.31%