-51% is the change from 551 to 270
Calculation steps:
[( 270 - 551 ) ÷ 551] x 100 = -51%
Formula
Percentage change = [(270 - 551) / 551] x 100
Subtract the new number by the original number
270 - 551 = -281
-281 ÷ 551 = -0.5099818511796733
-0.5099818511796733 x 100 = -51%