67.86% is the change from 420 to 705
Calculation steps:
[( 705 - 420 ) ÷ 420] x 100 = 67.86%
Formula
Percentage change = [(705 - 420) / 420] x 100
Subtract the new number by the original number
705 - 420 = 285
285 ÷ 420 = 0.6785714285714286
0.6785714285714286 x 100 = 67.86%