-69.82% is the change from 815 to 246
Calculation steps:
[( 246 - 815 ) ÷ 815] x 100 = -69.82%
Formula
Percentage change = [(246 - 815) / 815] x 100
Subtract the new number by the original number
246 - 815 = -569
-569 ÷ 815 = -0.698159509202454
-0.698159509202454 x 100 = -69.82%