85.27% is the change from 421 to 780
Calculation steps:
[( 780 - 421 ) ÷ 421] x 100 = 85.27%
Formula
Percentage change = [(780 - 421) / 421] x 100
Subtract the new number by the original number
780 - 421 = 359
359 ÷ 421 = 0.8527315914489311
0.8527315914489311 x 100 = 85.27%