-51.35% is the change from 555 to 270
Calculation steps:
[( 270 - 555 ) ÷ 555] x 100 = -51.35%
Formula
Percentage change = [(270 - 555) / 555] x 100
Subtract the new number by the original number
270 - 555 = -285
-285 ÷ 555 = -0.5135135135135135
-0.5135135135135135 x 100 = -51.35%