-79.98% is the change from 864 to 173
Calculation steps:
[( 173 - 864 ) ÷ 864] x 100 = -79.98%
Formula
Percentage change = [(173 - 864) / 864] x 100
Subtract the new number by the original number
173 - 864 = -691
-691 ÷ 864 = -0.7997685185185185
-0.7997685185185185 x 100 = -79.98%