-54.75% is the change from 179 to 81
Calculation steps:
[( 81 - 179 ) ÷ 179] x 100 = -54.75%
Formula
Percentage change = [(81 - 179) / 179] x 100
Subtract the new number by the original number
81 - 179 = -98
-98 ÷ 179 = -0.547486033519553
-0.547486033519553 x 100 = -54.75%