-19.49% is the change from 816 to 657
Calculation steps:
[( 657 - 816 ) ÷ 816] x 100 = -19.49%
Formula
Percentage change = [(657 - 816) / 816] x 100
Subtract the new number by the original number
657 - 816 = -159
-159 ÷ 816 = -0.1948529411764706
-0.1948529411764706 x 100 = -19.49%