-54.63% is the change from 615 to 279
Calculation steps:
[( 279 - 615 ) ÷ 615] x 100 = -54.63%
Formula
Percentage change = [(279 - 615) / 615] x 100
Subtract the new number by the original number
279 - 615 = -336
-336 ÷ 615 = -0.5463414634146342
-0.5463414634146342 x 100 = -54.63%