-91.97% is the change from 971 to 78
Calculation steps:
[( 78 - 971 ) ÷ 971] x 100 = -91.97%
Formula
Percentage change = [(78 - 971) / 971] x 100
Subtract the new number by the original number
78 - 971 = -893
-893 ÷ 971 = -0.9196704428424305
-0.9196704428424305 x 100 = -91.97%