-25.93% is the change from 891 to 660
Calculation steps:
[( 660 - 891 ) ÷ 891] x 100 = -25.93%
Formula
Percentage change = [(660 - 891) / 891] x 100
Subtract the new number by the original number
660 - 891 = -231
-231 ÷ 891 = -0.25925925925925924
-0.25925925925925924 x 100 = -25.93%