-66.99% is the change from 921 to 304
Calculation steps:
[( 304 - 921 ) ÷ 921] x 100 = -66.99%
Formula
Percentage change = [(304 - 921) / 921] x 100
Subtract the new number by the original number
304 - 921 = -617
-617 ÷ 921 = -0.6699239956568946
-0.6699239956568946 x 100 = -66.99%