80.34% is the change from 356 to 642
Calculation steps:
[( 642 - 356 ) ÷ 356] x 100 = 80.34%
Formula
Percentage change = [(642 - 356) / 356] x 100
Subtract the new number by the original number
642 - 356 = 286
286 ÷ 356 = 0.8033707865168539
0.8033707865168539 x 100 = 80.34%