-25.63% is the change from 827 to 615
Calculation steps:
[( 615 - 827 ) ÷ 827] x 100 = -25.63%
Formula
Percentage change = [(615 - 827) / 827] x 100
Subtract the new number by the original number
615 - 827 = -212
-212 ÷ 827 = -0.25634824667472794
-0.25634824667472794 x 100 = -25.63%