-52.66% is the change from 638 to 302
Calculation steps:
[( 302 - 638 ) ÷ 638] x 100 = -52.66%
Formula
Percentage change = [(302 - 638) / 638] x 100
Subtract the new number by the original number
302 - 638 = -336
-336 ÷ 638 = -0.5266457680250783
-0.5266457680250783 x 100 = -52.66%