-50.45% is the change from 551 to 273
Calculation steps:
[( 273 - 551 ) ÷ 551] x 100 = -50.45%
Formula
Percentage change = [(273 - 551) / 551] x 100
Subtract the new number by the original number
273 - 551 = -278
-278 ÷ 551 = -0.5045372050816697
-0.5045372050816697 x 100 = -50.45%