45.02% is the change from 642 to 931
Calculation steps:
[( 931 - 642 ) ÷ 642] x 100 = 45.02%
Formula
Percentage change = [(931 - 642) / 642] x 100
Subtract the new number by the original number
931 - 642 = 289
289 ÷ 642 = 0.4501557632398754
0.4501557632398754 x 100 = 45.02%