121.86% is the change from 311 to 690
Calculation steps:
[( 690 - 311 ) ÷ 311] x 100 = 121.86%
Formula
Percentage change = [(690 - 311) / 311] x 100
Subtract the new number by the original number
690 - 311 = 379
379 ÷ 311 = 1.2186495176848875
1.2186495176848875 x 100 = 121.86%