-64% is the change from 550 to 198
Calculation steps:
[( 198 - 550 ) ÷ 550] x 100 = -64%
Formula
Percentage change = [(198 - 550) / 550] x 100
Subtract the new number by the original number
198 - 550 = -352
-352 ÷ 550 = -0.64
-0.64 x 100 = -64%
Example