-76.32% is the change from 321 to 76
Calculation steps:
[( 76 - 321 ) ÷ 321] x 100 = -76.32%
Formula
Percentage change = [(76 - 321) / 321] x 100
Subtract the new number by the original number
76 - 321 = -245
-245 ÷ 321 = -0.7632398753894081
-0.7632398753894081 x 100 = -76.32%