-71.59% is the change from 271 to 77
Calculation steps:
[( 77 - 271 ) ÷ 271] x 100 = -71.59%
Formula
Percentage change = [(77 - 271) / 271] x 100
Subtract the new number by the original number
77 - 271 = -194
-194 ÷ 271 = -0.7158671586715867
-0.7158671586715867 x 100 = -71.59%