-36% is the change from 550 to 352
Calculation steps:
[( 352 - 550 ) ÷ 550] x 100 = -36%
Formula
Percentage change = [(352 - 550) / 550] x 100
Subtract the new number by the original number
352 - 550 = -198
-198 ÷ 550 = -0.36
-0.36 x 100 = -36%
Example