82.14% is the change from 420 to 765
Calculation steps:
[( 765 - 420 ) ÷ 420] x 100 = 82.14%
Formula
Percentage change = [(765 - 420) / 420] x 100
Subtract the new number by the original number
765 - 420 = 345
345 ÷ 420 = 0.8214285714285714
0.8214285714285714 x 100 = 82.14%