-50.27% is the change from 561 to 279
Calculation steps:
[( 279 - 561 ) ÷ 561] x 100 = -50.27%
Formula
Percentage change = [(279 - 561) / 561] x 100
Subtract the new number by the original number
279 - 561 = -282
-282 ÷ 561 = -0.5026737967914439
-0.5026737967914439 x 100 = -50.27%