-84.92% is the change from 849 to 128
Calculation steps:
[( 128 - 849 ) ÷ 849] x 100 = -84.92%
Formula
Percentage change = [(128 - 849) / 849] x 100
Subtract the new number by the original number
128 - 849 = -721
-721 ÷ 849 = -0.8492343934040048
-0.8492343934040048 x 100 = -84.92%