-60.61% is the change from 33 to 13
Calculation steps:
[( 13 - 33 ) ÷ 33] x 100 = -60.61%
Formula
Percentage change = [(13 - 33) / 33] x 100
Subtract the new number by the original number
13 - 33 = -20
-20 ÷ 33 = -0.6060606060606061
-0.6060606060606061 x 100 = -60.61%