-57.55% is the change from 815 to 346
Calculation steps:
[( 346 - 815 ) ÷ 815] x 100 = -57.55%
Formula
Percentage change = [(346 - 815) / 815] x 100
Subtract the new number by the original number
346 - 815 = -469
-469 ÷ 815 = -0.5754601226993865
-0.5754601226993865 x 100 = -57.55%