-73.33% is the change from 45 to 12
Calculation steps:
[( 12 - 45 ) ÷ 45] x 100 = -73.33%
Formula
Percentage change = [(12 - 45) / 45] x 100
Subtract the new number by the original number
12 - 45 = -33
-33 ÷ 45 = -0.7333333333333333
-0.7333333333333333 x 100 = -73.33%