-6.85% is the change from 920 to 857
Calculation steps:
[( 857 - 920 ) ÷ 920] x 100 = -6.85%
Formula
Percentage change = [(857 - 920) / 920] x 100
Subtract the new number by the original number
857 - 920 = -63
-63 ÷ 920 = -0.06847826086956521
-0.06847826086956521 x 100 = -6.85%