-14.94% is the change from 917 to 780
Calculation steps:
[( 780 - 917 ) ÷ 917] x 100 = -14.94%
Formula
Percentage change = [(780 - 917) / 917] x 100
Subtract the new number by the original number
780 - 917 = -137
-137 ÷ 917 = -0.14940021810250817
-0.14940021810250817 x 100 = -14.94%