-72.77% is the change from 639 to 174
Calculation steps:
[( 174 - 639 ) ÷ 639] x 100 = -72.77%
Formula
Percentage change = [(174 - 639) / 639] x 100
Subtract the new number by the original number
174 - 639 = -465
-465 ÷ 639 = -0.7276995305164319
-0.7276995305164319 x 100 = -72.77%