-16.3% is the change from 773 to 647
Calculation steps:
[( 647 - 773 ) ÷ 773] x 100 = -16.3%
Formula
Percentage change = [(647 - 773) / 773] x 100
Subtract the new number by the original number
647 - 773 = -126
-126 ÷ 773 = -0.1630012936610608
-0.1630012936610608 x 100 = -16.3%