-18% is the change from 828 to 679
Calculation steps:
[( 679 - 828 ) ÷ 828] x 100 = -18%
Formula
Percentage change = [(679 - 828) / 828] x 100
Subtract the new number by the original number
679 - 828 = -149
-149 ÷ 828 = -0.17995169082125603
-0.17995169082125603 x 100 = -18%