68.4% is the change from 231 to 389
Calculation steps:
[( 389 - 231 ) ÷ 231] x 100 = 68.4%
Formula
Percentage change = [(389 - 231) / 231] x 100
Subtract the new number by the original number
389 - 231 = 158
158 ÷ 231 = 0.683982683982684
0.683982683982684 x 100 = 68.4%