-57.97% is the change from 816 to 343
Calculation steps:
[( 343 - 816 ) ÷ 816] x 100 = -57.97%
Formula
Percentage change = [(343 - 816) / 816] x 100
Subtract the new number by the original number
343 - 816 = -473
-473 ÷ 816 = -0.5796568627450981
-0.5796568627450981 x 100 = -57.97%