349.28% is the change from 69 to 310
Calculation steps:
[( 310 - 69 ) ÷ 69] x 100 = 349.28%
Formula
Percentage change = [(310 - 69) / 69] x 100
Subtract the new number by the original number
310 - 69 = 241
241 ÷ 69 = 3.4927536231884058
3.4927536231884058 x 100 = 349.28%