-18.7% is the change from 957 to 778
Calculation steps:
[( 778 - 957 ) ÷ 957] x 100 = -18.7%
Formula
Percentage change = [(778 - 957) / 957] x 100
Subtract the new number by the original number
778 - 957 = -179
-179 ÷ 957 = -0.18704284221525602
-0.18704284221525602 x 100 = -18.7%