-2.36% is the change from 550 to 537
Calculation steps:
[( 537 - 550 ) ÷ 550] x 100 = -2.36%
Formula
Percentage change = [(537 - 550) / 550] x 100
Subtract the new number by the original number
537 - 550 = -13
-13 ÷ 550 = -0.023636363636363636
-0.023636363636363636 x 100 = -2.36%