83.43% is the change from 350 to 642
Calculation steps:
[( 642 - 350 ) ÷ 350] x 100 = 83.43%
Formula
Percentage change = [(642 - 350) / 350] x 100
Subtract the new number by the original number
642 - 350 = 292
292 ÷ 350 = 0.8342857142857143
0.8342857142857143 x 100 = 83.43%