6.86% is the change from 102 to 109
Calculation steps:
[( 109 - 102 ) ÷ 102] x 100 = 6.86%
Formula
Percentage change = [(109 - 102) / 102] x 100
Subtract the new number by the original number
109 - 102 = 7
7 ÷ 102 = 0.06862745098039216
0.06862745098039216 x 100 = 6.86%