-93.11% is the change from 639 to 44
Calculation steps:
[( 44 - 639 ) ÷ 639] x 100 = -93.11%
Formula
Percentage change = [(44 - 639) / 639] x 100
Subtract the new number by the original number
44 - 639 = -595
-595 ÷ 639 = -0.9311424100156495
-0.9311424100156495 x 100 = -93.11%