82.19% is the change from 421 to 767
Calculation steps:
[( 767 - 421 ) ÷ 421] x 100 = 82.19%
Formula
Percentage change = [(767 - 421) / 421] x 100
Subtract the new number by the original number
767 - 421 = 346
346 ÷ 421 = 0.8218527315914489
0.8218527315914489 x 100 = 82.19%