-13.3% is the change from 639 to 554
Calculation steps:
[( 554 - 639 ) ÷ 639] x 100 = -13.3%
Formula
Percentage change = [(554 - 639) / 639] x 100
Subtract the new number by the original number
554 - 639 = -85
-85 ÷ 639 = -0.13302034428794993
-0.13302034428794993 x 100 = -13.3%