-84.21% is the change from 779 to 123
Calculation steps:
[( 123 - 779 ) ÷ 779] x 100 = -84.21%
Formula
Percentage change = [(123 - 779) / 779] x 100
Subtract the new number by the original number
123 - 779 = -656
-656 ÷ 779 = -0.8421052631578947
-0.8421052631578947 x 100 = -84.21%