69.35% is the change from 248 to 420
Calculation steps:
[( 420 - 248 ) ÷ 248] x 100 = 69.35%
Formula
Percentage change = [(420 - 248) / 248] x 100
Subtract the new number by the original number
420 - 248 = 172
172 ÷ 248 = 0.6935483870967742
0.6935483870967742 x 100 = 69.35%