-62.91% is the change from 639 to 237
Calculation steps:
[( 237 - 639 ) ÷ 639] x 100 = -62.91%
Formula
Percentage change = [(237 - 639) / 639] x 100
Subtract the new number by the original number
237 - 639 = -402
-402 ÷ 639 = -0.6291079812206573
-0.6291079812206573 x 100 = -62.91%