-89.98% is the change from 848 to 85
Calculation steps:
[( 85 - 848 ) ÷ 848] x 100 = -89.98%
Formula
Percentage change = [(85 - 848) / 848] x 100
Subtract the new number by the original number
85 - 848 = -763
-763 ÷ 848 = -0.8997641509433962
-0.8997641509433962 x 100 = -89.98%