-18.15% is the change from 821 to 672
Calculation steps:
[( 672 - 821 ) ÷ 821] x 100 = -18.15%
Formula
Percentage change = [(672 - 821) / 821] x 100
Subtract the new number by the original number
672 - 821 = -149
-149 ÷ 821 = -0.1814859926918392
-0.1814859926918392 x 100 = -18.15%