-91.11% is the change from 45 to 4
Calculation steps:
[( 4 - 45 ) ÷ 45] x 100 = -91.11%
Formula
Percentage change = [(4 - 45) / 45] x 100
Subtract the new number by the original number
4 - 45 = -41
-41 ÷ 45 = -0.9111111111111111
-0.9111111111111111 x 100 = -91.11%