-98.7% is the change from 77 to 1
Calculation steps:
[( 1 - 77 ) ÷ 77] x 100 = -98.7%
Formula
Percentage change = [(1 - 77) / 77] x 100
Subtract the new number by the original number
1 - 77 = -76
-76 ÷ 77 = -0.987012987012987
-0.987012987012987 x 100 = -98.7%