128.57% is the change from 7 to 16
Calculation steps:
[( 16 - 7 ) ÷ 7] x 100 = 128.57%
Formula
Percentage change = [(16 - 7) / 7] x 100
Subtract the new number by the original number
16 - 7 = 9
9 ÷ 7 = 1.2857142857142858
1.2857142857142858 x 100 = 128.57%