-88.47% is the change from 859 to 99
Calculation steps:
[( 99 - 859 ) ÷ 859] x 100 = -88.47%
Formula
Percentage change = [(99 - 859) / 859] x 100
Subtract the new number by the original number
99 - 859 = -760
-760 ÷ 859 = -0.8847497089639115
-0.8847497089639115 x 100 = -88.47%