19.42% is the change from 139 to 166
Calculation steps:
[( 166 - 139 ) ÷ 139] x 100 = 19.42%
Formula
Percentage change = [(166 - 139) / 139] x 100
Subtract the new number by the original number
166 - 139 = 27
27 ÷ 139 = 0.19424460431654678
0.19424460431654678 x 100 = 19.42%