-89.19% is the change from 842 to 91
Calculation steps:
[( 91 - 842 ) ÷ 842] x 100 = -89.19%
Formula
Percentage change = [(91 - 842) / 842] x 100
Subtract the new number by the original number
91 - 842 = -751
-751 ÷ 842 = -0.8919239904988123
-0.8919239904988123 x 100 = -89.19%