-17.04% is the change from 810 to 672
Calculation steps:
[( 672 - 810 ) ÷ 810] x 100 = -17.04%
Formula
Percentage change = [(672 - 810) / 810] x 100
Subtract the new number by the original number
672 - 810 = -138
-138 ÷ 810 = -0.17037037037037037
-0.17037037037037037 x 100 = -17.04%