-11.72% is the change from 623 to 550
Calculation steps:
[( 550 - 623 ) ÷ 623] x 100 = -11.72%
Formula
Percentage change = [(550 - 623) / 623] x 100
Subtract the new number by the original number
550 - 623 = -73
-73 ÷ 623 = -0.11717495987158909
-0.11717495987158909 x 100 = -11.72%