-15.13% is the change from 919 to 780
Calculation steps:
[( 780 - 919 ) ÷ 919] x 100 = -15.13%
Formula
Percentage change = [(780 - 919) / 919] x 100
Subtract the new number by the original number
780 - 919 = -139
-139 ÷ 919 = -0.1512513601741023
-0.1512513601741023 x 100 = -15.13%