46.12% is the change from 438 to 640
Calculation steps:
[( 640 - 438 ) ÷ 438] x 100 = 46.12%
Formula
Percentage change = [(640 - 438) / 438] x 100
Subtract the new number by the original number
640 - 438 = 202
202 ÷ 438 = 0.4611872146118721
0.4611872146118721 x 100 = 46.12%