-57.6% is the change from 816 to 346
Calculation steps:
[( 346 - 816 ) ÷ 816] x 100 = -57.6%
Formula
Percentage change = [(346 - 816) / 816] x 100
Subtract the new number by the original number
346 - 816 = -470
-470 ÷ 816 = -0.5759803921568627
-0.5759803921568627 x 100 = -57.6%