65% is the change from 340 to 561
Calculation steps:
[( 561 - 340 ) ÷ 340] x 100 = 65%
Formula
Percentage change = [(561 - 340) / 340] x 100
Subtract the new number by the original number
561 - 340 = 221
221 ÷ 340 = 0.65
0.65 x 100 = 65%
Example