-90.21% is the change from 848 to 83
Calculation steps:
[( 83 - 848 ) ÷ 848] x 100 = -90.21%
Formula
Percentage change = [(83 - 848) / 848] x 100
Subtract the new number by the original number
83 - 848 = -765
-765 ÷ 848 = -0.902122641509434
-0.902122641509434 x 100 = -90.21%