-69.14% is the change from 81 to 25
Calculation steps:
[( 25 - 81 ) ÷ 81] x 100 = -69.14%
Formula
Percentage change = [(25 - 81) / 81] x 100
Subtract the new number by the original number
25 - 81 = -56
-56 ÷ 81 = -0.691358024691358
-0.691358024691358 x 100 = -69.14%