-15.86% is the change from 769 to 647
Calculation steps:
[( 647 - 769 ) ÷ 769] x 100 = -15.86%
Formula
Percentage change = [(647 - 769) / 769] x 100
Subtract the new number by the original number
647 - 769 = -122
-122 ÷ 769 = -0.15864759427828348
-0.15864759427828348 x 100 = -15.86%