68.1% is the change from 420 to 706
Calculation steps:
[( 706 - 420 ) ÷ 420] x 100 = 68.1%
Formula
Percentage change = [(706 - 420) / 420] x 100
Subtract the new number by the original number
706 - 420 = 286
286 ÷ 420 = 0.680952380952381
0.680952380952381 x 100 = 68.1%