-6.88% is the change from 857 to 798
Calculation steps:
[( 798 - 857 ) ÷ 857] x 100 = -6.88%
Formula
Percentage change = [(798 - 857) / 857] x 100
Subtract the new number by the original number
798 - 857 = -59
-59 ÷ 857 = -0.06884480746791131
-0.06884480746791131 x 100 = -6.88%