-54.17% is the change from 611 to 280
Calculation steps:
[( 280 - 611 ) ÷ 611] x 100 = -54.17%
Formula
Percentage change = [(280 - 611) / 611] x 100
Subtract the new number by the original number
280 - 611 = -331
-331 ÷ 611 = -0.5417348608837971
-0.5417348608837971 x 100 = -54.17%