70.56% is the change from 231 to 394
Calculation steps:
[( 394 - 231 ) ÷ 231] x 100 = 70.56%
Formula
Percentage change = [(394 - 231) / 231] x 100
Subtract the new number by the original number
394 - 231 = 163
163 ÷ 231 = 0.7056277056277056
0.7056277056277056 x 100 = 70.56%