20.69% is the change from 348 to 420
Calculation steps:
[( 420 - 348 ) ÷ 348] x 100 = 20.69%
Formula
Percentage change = [(420 - 348) / 348] x 100
Subtract the new number by the original number
420 - 348 = 72
72 ÷ 348 = 0.20689655172413793
0.20689655172413793 x 100 = 20.69%