-84.5% is the change from 329 to 51
Calculation steps:
[( 51 - 329 ) ÷ 329] x 100 = -84.5%
Formula
Percentage change = [(51 - 329) / 329] x 100
Subtract the new number by the original number
51 - 329 = -278
-278 ÷ 329 = -0.8449848024316109
-0.8449848024316109 x 100 = -84.5%