70.24% is the change from 420 to 715
Calculation steps:
[( 715 - 420 ) ÷ 420] x 100 = 70.24%
Formula
Percentage change = [(715 - 420) / 420] x 100
Subtract the new number by the original number
715 - 420 = 295
295 ÷ 420 = 0.7023809523809523
0.7023809523809523 x 100 = 70.24%