50.29% is the change from 346 to 520
Calculation steps:
[( 520 - 346 ) ÷ 346] x 100 = 50.29%
Formula
Percentage change = [(520 - 346) / 346] x 100
Subtract the new number by the original number
520 - 346 = 174
174 ÷ 346 = 0.5028901734104047
0.5028901734104047 x 100 = 50.29%