-28.1% is the change from 765 to 550
Calculation steps:
[( 550 - 765 ) ÷ 765] x 100 = -28.1%
Formula
Percentage change = [(550 - 765) / 765] x 100
Subtract the new number by the original number
550 - 765 = -215
-215 ÷ 765 = -0.28104575163398693
-0.28104575163398693 x 100 = -28.1%