-97.28% is the change from 773 to 21
Calculation steps:
[( 21 - 773 ) ÷ 773] x 100 = -97.28%
Formula
Percentage change = [(21 - 773) / 773] x 100
Subtract the new number by the original number
21 - 773 = -752
-752 ÷ 773 = -0.9728331177231565
-0.9728331177231565 x 100 = -97.28%