-57.89% is the change from 817 to 344
Calculation steps:
[( 344 - 817 ) ÷ 817] x 100 = -57.89%
Formula
Percentage change = [(344 - 817) / 817] x 100
Subtract the new number by the original number
344 - 817 = -473
-473 ÷ 817 = -0.5789473684210527
-0.5789473684210527 x 100 = -57.89%