-25.36% is the change from 824 to 615
Calculation steps:
[( 615 - 824 ) ÷ 824] x 100 = -25.36%
Formula
Percentage change = [(615 - 824) / 824] x 100
Subtract the new number by the original number
615 - 824 = -209
-209 ÷ 824 = -0.2536407766990291
-0.2536407766990291 x 100 = -25.36%