103.54% is the change from 339 to 690
Calculation steps:
[( 690 - 339 ) ÷ 339] x 100 = 103.54%
Formula
Percentage change = [(690 - 339) / 339] x 100
Subtract the new number by the original number
690 - 339 = 351
351 ÷ 339 = 1.0353982300884956
1.0353982300884956 x 100 = 103.54%