-80.49% is the change from 615 to 120
Calculation steps:
[( 120 - 615 ) ÷ 615] x 100 = -80.49%
Formula
Percentage change = [(120 - 615) / 615] x 100
Subtract the new number by the original number
120 - 615 = -495
-495 ÷ 615 = -0.8048780487804879
-0.8048780487804879 x 100 = -80.49%