27.14% is the change from 420 to 534
Calculation steps:
[( 534 - 420 ) ÷ 420] x 100 = 27.14%
Formula
Percentage change = [(534 - 420) / 420] x 100
Subtract the new number by the original number
534 - 420 = 114
114 ÷ 420 = 0.2714285714285714
0.2714285714285714 x 100 = 27.14%