397.1% is the change from 69 to 343
Calculation steps:
[( 343 - 69 ) ÷ 69] x 100 = 397.1%
Formula
Percentage change = [(343 - 69) / 69] x 100
Subtract the new number by the original number
343 - 69 = 274
274 ÷ 69 = 3.971014492753623
3.971014492753623 x 100 = 397.1%