-30.85% is the change from 927 to 641
Calculation steps:
[( 641 - 927 ) ÷ 927] x 100 = -30.85%
Formula
Percentage change = [(641 - 927) / 927] x 100
Subtract the new number by the original number
641 - 927 = -286
-286 ÷ 927 = -0.30852211434735705
-0.30852211434735705 x 100 = -30.85%