-17.9% is the change from 821 to 674
Calculation steps:
[( 674 - 821 ) ÷ 821] x 100 = -17.9%
Formula
Percentage change = [(674 - 821) / 821] x 100
Subtract the new number by the original number
674 - 821 = -147
-147 ÷ 821 = -0.17904993909866018
-0.17904993909866018 x 100 = -17.9%