-57.18% is the change from 815 to 349
Calculation steps:
[( 349 - 815 ) ÷ 815] x 100 = -57.18%
Formula
Percentage change = [(349 - 815) / 815] x 100
Subtract the new number by the original number
349 - 815 = -466
-466 ÷ 815 = -0.5717791411042945
-0.5717791411042945 x 100 = -57.18%