-71.91% is the change from 178 to 50
Calculation steps:
[( 50 - 178 ) ÷ 178] x 100 = -71.91%
Formula
Percentage change = [(50 - 178) / 178] x 100
Subtract the new number by the original number
50 - 178 = -128
-128 ÷ 178 = -0.7191011235955056
-0.7191011235955056 x 100 = -71.91%