-12.37% is the change from 978 to 857
Calculation steps:
[( 857 - 978 ) ÷ 978] x 100 = -12.37%
Formula
Percentage change = [(857 - 978) / 978] x 100
Subtract the new number by the original number
857 - 978 = -121
-121 ÷ 978 = -0.12372188139059305
-0.12372188139059305 x 100 = -12.37%