-10.88% is the change from 919 to 819
Calculation steps:
[( 819 - 919 ) ÷ 919] x 100 = -10.88%
Formula
Percentage change = [(819 - 919) / 919] x 100
Subtract the new number by the original number
819 - 919 = -100
-100 ÷ 919 = -0.1088139281828074
-0.1088139281828074 x 100 = -10.88%