-29.03% is the change from 775 to 550
Calculation steps:
[( 550 - 775 ) ÷ 775] x 100 = -29.03%
Formula
Percentage change = [(550 - 775) / 775] x 100
Subtract the new number by the original number
550 - 775 = -225
-225 ÷ 775 = -0.2903225806451613
-0.2903225806451613 x 100 = -29.03%