-49.18% is the change from 551 to 280
Calculation steps:
[( 280 - 551 ) ÷ 551] x 100 = -49.18%
Formula
Percentage change = [(280 - 551) / 551] x 100
Subtract the new number by the original number
280 - 551 = -271
-271 ÷ 551 = -0.49183303085299457
-0.49183303085299457 x 100 = -49.18%