69.12% is the change from 421 to 712
Calculation steps:
[( 712 - 421 ) ÷ 421] x 100 = 69.12%
Formula
Percentage change = [(712 - 421) / 421] x 100
Subtract the new number by the original number
712 - 421 = 291
291 ÷ 421 = 0.6912114014251781
0.6912114014251781 x 100 = 69.12%