-82.31% is the change from 780 to 138
Calculation steps:
[( 138 - 780 ) ÷ 780] x 100 = -82.31%
Formula
Percentage change = [(138 - 780) / 780] x 100
Subtract the new number by the original number
138 - 780 = -642
-642 ÷ 780 = -0.823076923076923
-0.823076923076923 x 100 = -82.31%