-29.4% is the change from 779 to 550
Calculation steps:
[( 550 - 779 ) ÷ 779] x 100 = -29.4%
Formula
Percentage change = [(550 - 779) / 779] x 100
Subtract the new number by the original number
550 - 779 = -229
-229 ÷ 779 = -0.2939666238767651
-0.2939666238767651 x 100 = -29.4%