-97.78% is the change from 45 to 1
Calculation steps:
[( 1 - 45 ) ÷ 45] x 100 = -97.78%
Formula
Percentage change = [(1 - 45) / 45] x 100
Subtract the new number by the original number
1 - 45 = -44
-44 ÷ 45 = -0.9777777777777777
-0.9777777777777777 x 100 = -97.78%