-8.97% is the change from 78 to 71
Calculation steps:
[( 71 - 78 ) ÷ 78] x 100 = -8.97%
Formula
Percentage change = [(71 - 78) / 78] x 100
Subtract the new number by the original number
71 - 78 = -7
-7 ÷ 78 = -0.08974358974358974
-0.08974358974358974 x 100 = -8.97%