12.86% is the change from 70 to 79
Calculation steps:
[( 79 - 70 ) ÷ 70] x 100 = 12.86%
Formula
Percentage change = [(79 - 70) / 70] x 100
Subtract the new number by the original number
79 - 70 = 9
9 ÷ 70 = 0.12857142857142856
0.12857142857142856 x 100 = 12.86%