-1.95% is the change from 615 to 603
Calculation steps:
[( 603 - 615 ) ÷ 615] x 100 = -1.95%
Formula
Percentage change = [(603 - 615) / 615] x 100
Subtract the new number by the original number
603 - 615 = -12
-12 ÷ 615 = -0.01951219512195122
-0.01951219512195122 x 100 = -1.95%