124.51% is the change from 306 to 687
Calculation steps:
[( 687 - 306 ) ÷ 306] x 100 = 124.51%
Formula
Percentage change = [(687 - 306) / 306] x 100
Subtract the new number by the original number
687 - 306 = 381
381 ÷ 306 = 1.2450980392156863
1.2450980392156863 x 100 = 124.51%