-15.49% is the change from 923 to 780
Calculation steps:
[( 780 - 923 ) ÷ 923] x 100 = -15.49%
Formula
Percentage change = [(780 - 923) / 923] x 100
Subtract the new number by the original number
780 - 923 = -143
-143 ÷ 923 = -0.15492957746478872
-0.15492957746478872 x 100 = -15.49%