-78.7% is the change from 615 to 131
Calculation steps:
[( 131 - 615 ) ÷ 615] x 100 = -78.7%
Formula
Percentage change = [(131 - 615) / 615] x 100
Subtract the new number by the original number
131 - 615 = -484
-484 ÷ 615 = -0.7869918699186992
-0.7869918699186992 x 100 = -78.7%