-59.28% is the change from 857 to 349
Calculation steps:
[( 349 - 857 ) ÷ 857] x 100 = -59.28%
Formula
Percentage change = [(349 - 857) / 857] x 100
Subtract the new number by the original number
349 - 857 = -508
-508 ÷ 857 = -0.5927654609101517
-0.5927654609101517 x 100 = -59.28%