-88.66% is the change from 820 to 93
Calculation steps:
[( 93 - 820 ) ÷ 820] x 100 = -88.66%
Formula
Percentage change = [(93 - 820) / 820] x 100
Subtract the new number by the original number
93 - 820 = -727
-727 ÷ 820 = -0.8865853658536585
-0.8865853658536585 x 100 = -88.66%