-83.91% is the change from 988 to 159
Calculation steps:
[( 159 - 988 ) ÷ 988] x 100 = -83.91%
Formula
Percentage change = [(159 - 988) / 988] x 100
Subtract the new number by the original number
159 - 988 = -829
-829 ÷ 988 = -0.8390688259109311
-0.8390688259109311 x 100 = -83.91%