-98.06% is the change from 773 to 15
Calculation steps:
[( 15 - 773 ) ÷ 773] x 100 = -98.06%
Formula
Percentage change = [(15 - 773) / 773] x 100
Subtract the new number by the original number
15 - 773 = -758
-758 ÷ 773 = -0.9805950840879689
-0.9805950840879689 x 100 = -98.06%