125% is the change from 304 to 684
Calculation steps:
[( 684 - 304 ) ÷ 304] x 100 = 125%
Formula
Percentage change = [(684 - 304) / 304] x 100
Subtract the new number by the original number
684 - 304 = 380
380 ÷ 304 = 1.25
1.25 x 100 = 125%
Example