-67.4% is the change from 638 to 208
Calculation steps:
[( 208 - 638 ) ÷ 638] x 100 = -67.4%
Formula
Percentage change = [(208 - 638) / 638] x 100
Subtract the new number by the original number
208 - 638 = -430
-430 ÷ 638 = -0.6739811912225705
-0.6739811912225705 x 100 = -67.4%