-19.98% is the change from 971 to 777
Calculation steps:
[( 777 - 971 ) ÷ 971] x 100 = -19.98%
Formula
Percentage change = [(777 - 971) / 971] x 100
Subtract the new number by the original number
777 - 971 = -194
-194 ÷ 971 = -0.19979402677651906
-0.19979402677651906 x 100 = -19.98%