-16.9% is the change from 988 to 821
Calculation steps:
[( 821 - 988 ) ÷ 988] x 100 = -16.9%
Formula
Percentage change = [(821 - 988) / 988] x 100
Subtract the new number by the original number
821 - 988 = -167
-167 ÷ 988 = -0.16902834008097167
-0.16902834008097167 x 100 = -16.9%