-53.52% is the change from 639 to 297
Calculation steps:
[( 297 - 639 ) ÷ 639] x 100 = -53.52%
Formula
Percentage change = [(297 - 639) / 639] x 100
Subtract the new number by the original number
297 - 639 = -342
-342 ÷ 639 = -0.5352112676056338
-0.5352112676056338 x 100 = -53.52%