40.23% is the change from 343 to 481
Calculation steps:
[( 481 - 343 ) ÷ 343] x 100 = 40.23%
Formula
Percentage change = [(481 - 343) / 343] x 100
Subtract the new number by the original number
481 - 343 = 138
138 ÷ 343 = 0.40233236151603496
0.40233236151603496 x 100 = 40.23%