-89.86% is the change from 779 to 79
Calculation steps:
[( 79 - 779 ) ÷ 779] x 100 = -89.86%
Formula
Percentage change = [(79 - 779) / 779] x 100
Subtract the new number by the original number
79 - 779 = -700
-700 ÷ 779 = -0.8985879332477535
-0.8985879332477535 x 100 = -89.86%