-37.24% is the change from 921 to 578
Calculation steps:
[( 578 - 921 ) ÷ 921] x 100 = -37.24%
Formula
Percentage change = [(578 - 921) / 921] x 100
Subtract the new number by the original number
578 - 921 = -343
-343 ÷ 921 = -0.3724212812160695
-0.3724212812160695 x 100 = -37.24%