-16.43% is the change from 773 to 646
Calculation steps:
[( 646 - 773 ) ÷ 773] x 100 = -16.43%
Formula
Percentage change = [(646 - 773) / 773] x 100
Subtract the new number by the original number
646 - 773 = -127
-127 ÷ 773 = -0.16429495472186287
-0.16429495472186287 x 100 = -16.43%