-15.42% is the change from 921 to 779
Calculation steps:
[( 779 - 921 ) ÷ 921] x 100 = -15.42%
Formula
Percentage change = [(779 - 921) / 921] x 100
Subtract the new number by the original number
779 - 921 = -142
-142 ÷ 921 = -0.15418023887079263
-0.15418023887079263 x 100 = -15.42%