69.83% is the change from 421 to 715
Calculation steps:
[( 715 - 421 ) ÷ 421] x 100 = 69.83%
Formula
Percentage change = [(715 - 421) / 421] x 100
Subtract the new number by the original number
715 - 421 = 294
294 ÷ 421 = 0.6983372921615202
0.6983372921615202 x 100 = 69.83%