18.64% is the change from 354 to 420
Calculation steps:
[( 420 - 354 ) ÷ 354] x 100 = 18.64%
Formula
Percentage change = [(420 - 354) / 354] x 100
Subtract the new number by the original number
420 - 354 = 66
66 ÷ 354 = 0.1864406779661017
0.1864406779661017 x 100 = 18.64%