-82.5% is the change from 80 to 14
Calculation steps:
[( 14 - 80 ) ÷ 80] x 100 = -82.5%
Formula
Percentage change = [(14 - 80) / 80] x 100
Subtract the new number by the original number
14 - 80 = -66
-66 ÷ 80 = -0.825
-0.825 x 100 = -82.5%
Example