-50.09% is the change from 551 to 275
Calculation steps:
[( 275 - 551 ) ÷ 551] x 100 = -50.09%
Formula
Percentage change = [(275 - 551) / 551] x 100
Subtract the new number by the original number
275 - 551 = -276
-276 ÷ 551 = -0.5009074410163339
-0.5009074410163339 x 100 = -50.09%