6.06% is the change from 66 to 70
Calculation steps:
[( 70 - 66 ) ÷ 66] x 100 = 6.06%
Formula
Percentage change = [(70 - 66) / 66] x 100
Subtract the new number by the original number
70 - 66 = 4
4 ÷ 66 = 0.06060606060606061
0.06060606060606061 x 100 = 6.06%