33.57% is the change from 420 to 561
Calculation steps:
[( 561 - 420 ) ÷ 420] x 100 = 33.57%
Formula
Percentage change = [(561 - 420) / 420] x 100
Subtract the new number by the original number
561 - 420 = 141
141 ÷ 420 = 0.3357142857142857
0.3357142857142857 x 100 = 33.57%