123.86% is the change from 306 to 685
Calculation steps:
[( 685 - 306 ) ÷ 306] x 100 = 123.86%
Formula
Percentage change = [(685 - 306) / 306] x 100
Subtract the new number by the original number
685 - 306 = 379
379 ÷ 306 = 1.238562091503268
1.238562091503268 x 100 = 123.86%