-69.6% is the change from 329 to 100
Calculation steps:
[( 100 - 329 ) ÷ 329] x 100 = -69.6%
Formula
Percentage change = [(100 - 329) / 329] x 100
Subtract the new number by the original number
100 - 329 = -229
-229 ÷ 329 = -0.6960486322188449
-0.6960486322188449 x 100 = -69.6%