121.47% is the change from 312 to 691
Calculation steps:
[( 691 - 312 ) ÷ 312] x 100 = 121.47%
Formula
Percentage change = [(691 - 312) / 312] x 100
Subtract the new number by the original number
691 - 312 = 379
379 ÷ 312 = 1.2147435897435896
1.2147435897435896 x 100 = 121.47%