120.9% is the change from 311 to 687
Calculation steps:
[( 687 - 311 ) ÷ 311] x 100 = 120.9%
Formula
Percentage change = [(687 - 311) / 311] x 100
Subtract the new number by the original number
687 - 311 = 376
376 ÷ 311 = 1.2090032154340835
1.2090032154340835 x 100 = 120.9%