-72.19% is the change from 773 to 215
Calculation steps:
[( 215 - 773 ) ÷ 773] x 100 = -72.19%
Formula
Percentage change = [(215 - 773) / 773] x 100
Subtract the new number by the original number
215 - 773 = -558
-558 ÷ 773 = -0.7218628719275549
-0.7218628719275549 x 100 = -72.19%