-17.21% is the change from 988 to 818
Calculation steps:
[( 818 - 988 ) ÷ 988] x 100 = -17.21%
Formula
Percentage change = [(818 - 988) / 988] x 100
Subtract the new number by the original number
818 - 988 = -170
-170 ÷ 988 = -0.1720647773279352
-0.1720647773279352 x 100 = -17.21%