-1.91% is the change from 627 to 615
Calculation steps:
[( 615 - 627 ) ÷ 627] x 100 = -1.91%
Formula
Percentage change = [(615 - 627) / 627] x 100
Subtract the new number by the original number
615 - 627 = -12
-12 ÷ 627 = -0.019138755980861243
-0.019138755980861243 x 100 = -1.91%