-97.13% is the change from 977 to 28
Calculation steps:
[( 28 - 977 ) ÷ 977] x 100 = -97.13%
Formula
Percentage change = [(28 - 977) / 977] x 100
Subtract the new number by the original number
28 - 977 = -949
-949 ÷ 977 = -0.9713408393039918
-0.9713408393039918 x 100 = -97.13%