-45.07% is the change from 639 to 351
Calculation steps:
[( 351 - 639 ) ÷ 639] x 100 = -45.07%
Formula
Percentage change = [(351 - 639) / 639] x 100
Subtract the new number by the original number
351 - 639 = -288
-288 ÷ 639 = -0.4507042253521127
-0.4507042253521127 x 100 = -45.07%