-71.06% is the change from 857 to 248
Calculation steps:
[( 248 - 857 ) ÷ 857] x 100 = -71.06%
Formula
Percentage change = [(248 - 857) / 857] x 100
Subtract the new number by the original number
248 - 857 = -609
-609 ÷ 857 = -0.7106184364060677
-0.7106184364060677 x 100 = -71.06%