9.1% is the change from 879 to 959
Calculation steps:
[( 959 - 879 ) ÷ 879] x 100 = 9.1%
Formula
Percentage change = [(959 - 879) / 879] x 100
Subtract the new number by the original number
959 - 879 = 80
80 ÷ 879 = 0.09101251422070535
0.09101251422070535 x 100 = 9.1%