7.58% is the change from 66 to 71
Calculation steps:
[( 71 - 66 ) ÷ 66] x 100 = 7.58%
Formula
Percentage change = [(71 - 66) / 66] x 100
Subtract the new number by the original number
71 - 66 = 5
5 ÷ 66 = 0.07575757575757576
0.07575757575757576 x 100 = 7.58%