29.76% is the change from 420 to 545
Calculation steps:
[( 545 - 420 ) ÷ 420] x 100 = 29.76%
Formula
Percentage change = [(545 - 420) / 420] x 100
Subtract the new number by the original number
545 - 420 = 125
125 ÷ 420 = 0.2976190476190476
0.2976190476190476 x 100 = 29.76%