-10.13% is the change from 79 to 71
Calculation steps:
[( 71 - 79 ) ÷ 79] x 100 = -10.13%
Formula
Percentage change = [(71 - 79) / 79] x 100
Subtract the new number by the original number
71 - 79 = -8
-8 ÷ 79 = -0.10126582278481013
-0.10126582278481013 x 100 = -10.13%