-98.72% is the change from 78 to 1
Calculation steps:
[( 1 - 78 ) ÷ 78] x 100 = -98.72%
Formula
Percentage change = [(1 - 78) / 78] x 100
Subtract the new number by the original number
1 - 78 = -77
-77 ÷ 78 = -0.9871794871794872
-0.9871794871794872 x 100 = -98.72%