-7.79% is the change from 77 to 71
Calculation steps:
[( 71 - 77 ) ÷ 77] x 100 = -7.79%
Formula
Percentage change = [(71 - 77) / 77] x 100
Subtract the new number by the original number
71 - 77 = -6
-6 ÷ 77 = -0.07792207792207792
-0.07792207792207792 x 100 = -7.79%