51.95% is the change from 231 to 351
Calculation steps:
[( 351 - 231 ) ÷ 231] x 100 = 51.95%
Formula
Percentage change = [(351 - 231) / 231] x 100
Subtract the new number by the original number
351 - 231 = 120
120 ÷ 231 = 0.5194805194805194
0.5194805194805194 x 100 = 51.95%