121.22% is the change from 311 to 688
Calculation steps:
[( 688 - 311 ) ÷ 311] x 100 = 121.22%
Formula
Percentage change = [(688 - 311) / 311] x 100
Subtract the new number by the original number
688 - 311 = 377
377 ÷ 311 = 1.212218649517685
1.212218649517685 x 100 = 121.22%