8.57% is the change from 70 to 76
Calculation steps:
[( 76 - 70 ) ÷ 70] x 100 = 8.57%
Formula
Percentage change = [(76 - 70) / 70] x 100
Subtract the new number by the original number
76 - 70 = 6
6 ÷ 70 = 0.08571428571428572
0.08571428571428572 x 100 = 8.57%