-67% is the change from 997 to 329
Calculation steps:
[( 329 - 997 ) ÷ 997] x 100 = -67%
Formula
Percentage change = [(329 - 997) / 997] x 100
Subtract the new number by the original number
329 - 997 = -668
-668 ÷ 997 = -0.6700100300902708
-0.6700100300902708 x 100 = -67%