-98.48% is the change from 66 to 1
Calculation steps:
[( 1 - 66 ) ÷ 66] x 100 = -98.48%
Formula
Percentage change = [(1 - 66) / 66] x 100
Subtract the new number by the original number
1 - 66 = -65
-65 ÷ 66 = -0.9848484848484849
-0.9848484848484849 x 100 = -98.48%