-96.46% is the change from 848 to 30
Calculation steps:
[( 30 - 848 ) ÷ 848] x 100 = -96.46%
Formula
Percentage change = [(30 - 848) / 848] x 100
Subtract the new number by the original number
30 - 848 = -818
-818 ÷ 848 = -0.964622641509434
-0.964622641509434 x 100 = -96.46%