39.88% is the change from 642 to 898
Calculation steps:
[( 898 - 642 ) ÷ 642] x 100 = 39.88%
Formula
Percentage change = [(898 - 642) / 642] x 100
Subtract the new number by the original number
898 - 642 = 256
256 ÷ 642 = 0.3987538940809969
0.3987538940809969 x 100 = 39.88%