-71.11% is the change from 45 to 13
Calculation steps:
[( 13 - 45 ) ÷ 45] x 100 = -71.11%
Formula
Percentage change = [(13 - 45) / 45] x 100
Subtract the new number by the original number
13 - 45 = -32
-32 ÷ 45 = -0.7111111111111111
-0.7111111111111111 x 100 = -71.11%