-88.27% is the change from 844 to 99
Calculation steps:
[( 99 - 844 ) ÷ 844] x 100 = -88.27%
Formula
Percentage change = [(99 - 844) / 844] x 100
Subtract the new number by the original number
99 - 844 = -745
-745 ÷ 844 = -0.8827014218009479
-0.8827014218009479 x 100 = -88.27%