-48.04% is the change from 639 to 332
Calculation steps:
[( 332 - 639 ) ÷ 639] x 100 = -48.04%
Formula
Percentage change = [(332 - 639) / 639] x 100
Subtract the new number by the original number
332 - 639 = -307
-307 ÷ 639 = -0.48043818466353677
-0.48043818466353677 x 100 = -48.04%