-99.64% is the change from 550 to 2
Calculation steps:
[( 2 - 550 ) ÷ 550] x 100 = -99.64%
Formula
Percentage change = [(2 - 550) / 550] x 100
Subtract the new number by the original number
2 - 550 = -548
-548 ÷ 550 = -0.9963636363636363
-0.9963636363636363 x 100 = -99.64%