-65.09% is the change from 550 to 192
Calculation steps:
[( 192 - 550 ) ÷ 550] x 100 = -65.09%
Formula
Percentage change = [(192 - 550) / 550] x 100
Subtract the new number by the original number
192 - 550 = -358
-358 ÷ 550 = -0.6509090909090909
-0.6509090909090909 x 100 = -65.09%