64.06% is the change from 345 to 566
Calculation steps:
[( 566 - 345 ) ÷ 345] x 100 = 64.06%
Formula
Percentage change = [(566 - 345) / 345] x 100
Subtract the new number by the original number
566 - 345 = 221
221 ÷ 345 = 0.6405797101449275
0.6405797101449275 x 100 = 64.06%