-13.7% is the change from 993 to 857
Calculation steps:
[( 857 - 993 ) ÷ 993] x 100 = -13.7%
Formula
Percentage change = [(857 - 993) / 993] x 100
Subtract the new number by the original number
857 - 993 = -136
-136 ÷ 993 = -0.13695871097683787
-0.13695871097683787 x 100 = -13.7%