-25.03% is the change from 815 to 611
Calculation steps:
[( 611 - 815 ) ÷ 815] x 100 = -25.03%
Formula
Percentage change = [(611 - 815) / 815] x 100
Subtract the new number by the original number
611 - 815 = -204
-204 ÷ 815 = -0.25030674846625767
-0.25030674846625767 x 100 = -25.03%