-8.89% is the change from 675 to 615
Calculation steps:
[( 615 - 675 ) ÷ 675] x 100 = -8.89%
Formula
Percentage change = [(615 - 675) / 675] x 100
Subtract the new number by the original number
615 - 675 = -60
-60 ÷ 675 = -0.08888888888888889
-0.08888888888888889 x 100 = -8.89%