71.43% is the change from 7 to 12
Calculation steps:
[( 12 - 7 ) ÷ 7] x 100 = 71.43%
Formula
Percentage change = [(12 - 7) / 7] x 100
Subtract the new number by the original number
12 - 7 = 5
5 ÷ 7 = 0.7142857142857143
0.7142857142857143 x 100 = 71.43%