391.3% is the change from 69 to 339
Calculation steps:
[( 339 - 69 ) ÷ 69] x 100 = 391.3%
Formula
Percentage change = [(339 - 69) / 69] x 100
Subtract the new number by the original number
339 - 69 = 270
270 ÷ 69 = 3.9130434782608696
3.9130434782608696 x 100 = 391.3%