-59.98% is the change from 857 to 343
Calculation steps:
[( 343 - 857 ) ÷ 857] x 100 = -59.98%
Formula
Percentage change = [(343 - 857) / 857] x 100
Subtract the new number by the original number
343 - 857 = -514
-514 ÷ 857 = -0.5997666277712952
-0.5997666277712952 x 100 = -59.98%