38.83% is the change from 461 to 640
Calculation steps:
[( 640 - 461 ) ÷ 461] x 100 = 38.83%
Formula
Percentage change = [(640 - 461) / 461] x 100
Subtract the new number by the original number
640 - 461 = 179
179 ÷ 461 = 0.3882863340563991
0.3882863340563991 x 100 = 38.83%