-31.22% is the change from 615 to 423
Calculation steps:
[( 423 - 615 ) ÷ 615] x 100 = -31.22%
Formula
Percentage change = [(423 - 615) / 615] x 100
Subtract the new number by the original number
423 - 615 = -192
-192 ÷ 615 = -0.3121951219512195
-0.3121951219512195 x 100 = -31.22%