17.86% is the change from 420 to 495
Calculation steps:
[( 495 - 420 ) ÷ 420] x 100 = 17.86%
Formula
Percentage change = [(495 - 420) / 420] x 100
Subtract the new number by the original number
495 - 420 = 75
75 ÷ 420 = 0.17857142857142858
0.17857142857142858 x 100 = 17.86%