-50.3% is the change from 662 to 329
Calculation steps:
[( 329 - 662 ) ÷ 662] x 100 = -50.3%
Formula
Percentage change = [(329 - 662) / 662] x 100
Subtract the new number by the original number
329 - 662 = -333
-333 ÷ 662 = -0.5030211480362538
-0.5030211480362538 x 100 = -50.3%