138.53% is the change from 231 to 551
Calculation steps:
[( 551 - 231 ) ÷ 231] x 100 = 138.53%
Formula
Percentage change = [(551 - 231) / 231] x 100
Subtract the new number by the original number
551 - 231 = 320
320 ÷ 231 = 1.3852813852813852
1.3852813852813852 x 100 = 138.53%