-59.62% is the change from 639 to 258
Calculation steps:
[( 258 - 639 ) ÷ 639] x 100 = -59.62%
Formula
Percentage change = [(258 - 639) / 639] x 100
Subtract the new number by the original number
258 - 639 = -381
-381 ÷ 639 = -0.596244131455399
-0.596244131455399 x 100 = -59.62%