66.48% is the change from 349 to 581
Calculation steps:
[( 581 - 349 ) ÷ 349] x 100 = 66.48%
Formula
Percentage change = [(581 - 349) / 349] x 100
Subtract the new number by the original number
581 - 349 = 232
232 ÷ 349 = 0.664756446991404
0.664756446991404 x 100 = 66.48%