-15.59% is the change from 821 to 693
Calculation steps:
[( 693 - 821 ) ÷ 821] x 100 = -15.59%
Formula
Percentage change = [(693 - 821) / 821] x 100
Subtract the new number by the original number
693 - 821 = -128
-128 ÷ 821 = -0.1559074299634592
-0.1559074299634592 x 100 = -15.59%