-80.33% is the change from 615 to 121
Calculation steps:
[( 121 - 615 ) ÷ 615] x 100 = -80.33%
Formula
Percentage change = [(121 - 615) / 615] x 100
Subtract the new number by the original number
121 - 615 = -494
-494 ÷ 615 = -0.8032520325203252
-0.8032520325203252 x 100 = -80.33%