-83.09% is the change from 615 to 104
Calculation steps:
[( 104 - 615 ) ÷ 615] x 100 = -83.09%
Formula
Percentage change = [(104 - 615) / 615] x 100
Subtract the new number by the original number
104 - 615 = -511
-511 ÷ 615 = -0.8308943089430895
-0.8308943089430895 x 100 = -83.09%