-62% is the change from 550 to 209
Calculation steps:
[( 209 - 550 ) ÷ 550] x 100 = -62%
Formula
Percentage change = [(209 - 550) / 550] x 100
Subtract the new number by the original number
209 - 550 = -341
-341 ÷ 550 = -0.62
-0.62 x 100 = -62%
Example