-15.74% is the change from 788 to 664
Calculation steps:
[( 664 - 788 ) ÷ 788] x 100 = -15.74%
Formula
Percentage change = [(664 - 788) / 788] x 100
Subtract the new number by the original number
664 - 788 = -124
-124 ÷ 788 = -0.15736040609137056
-0.15736040609137056 x 100 = -15.74%