-77.93% is the change from 639 to 141
Calculation steps:
[( 141 - 639 ) ÷ 639] x 100 = -77.93%
Formula
Percentage change = [(141 - 639) / 639] x 100
Subtract the new number by the original number
141 - 639 = -498
-498 ÷ 639 = -0.7793427230046949
-0.7793427230046949 x 100 = -77.93%