-74.7% is the change from 328 to 83
Calculation steps:
[( 83 - 328 ) ÷ 328] x 100 = -74.7%
Formula
Percentage change = [(83 - 328) / 328] x 100
Subtract the new number by the original number
83 - 328 = -245
-245 ÷ 328 = -0.7469512195121951
-0.7469512195121951 x 100 = -74.7%