-35.46% is the change from 815 to 526
Calculation steps:
[( 526 - 815 ) ÷ 815] x 100 = -35.46%
Formula
Percentage change = [(526 - 815) / 815] x 100
Subtract the new number by the original number
526 - 815 = -289
-289 ÷ 815 = -0.35460122699386504
-0.35460122699386504 x 100 = -35.46%