347.83% is the change from 69 to 309
Calculation steps:
[( 309 - 69 ) ÷ 69] x 100 = 347.83%
Formula
Percentage change = [(309 - 69) / 69] x 100
Subtract the new number by the original number
309 - 69 = 240
240 ÷ 69 = 3.4782608695652173
3.4782608695652173 x 100 = 347.83%