-90.42% is the change from 971 to 93
Calculation steps:
[( 93 - 971 ) ÷ 971] x 100 = -90.42%
Formula
Percentage change = [(93 - 971) / 971] x 100
Subtract the new number by the original number
93 - 971 = -878
-878 ÷ 971 = -0.9042224510813595
-0.9042224510813595 x 100 = -90.42%