122.9% is the change from 310 to 691
Calculation steps:
[( 691 - 310 ) ÷ 310] x 100 = 122.9%
Formula
Percentage change = [(691 - 310) / 310] x 100
Subtract the new number by the original number
691 - 310 = 381
381 ÷ 310 = 1.229032258064516
1.229032258064516 x 100 = 122.9%