121.61% is the change from 310 to 687
Calculation steps:
[( 687 - 310 ) ÷ 310] x 100 = 121.61%
Formula
Percentage change = [(687 - 310) / 310] x 100
Subtract the new number by the original number
687 - 310 = 377
377 ÷ 310 = 1.2161290322580645
1.2161290322580645 x 100 = 121.61%