77.1% is the change from 345 to 611
Calculation steps:
[( 611 - 345 ) ÷ 345] x 100 = 77.1%
Formula
Percentage change = [(611 - 345) / 345] x 100
Subtract the new number by the original number
611 - 345 = 266
266 ÷ 345 = 0.7710144927536232
0.7710144927536232 x 100 = 77.1%