-30.67% is the change from 564 to 391
Calculation steps:
[( 391 - 564 ) ÷ 564] x 100 = -30.67%
Formula
Percentage change = [(391 - 564) / 564] x 100
Subtract the new number by the original number
391 - 564 = -173
-173 ÷ 564 = -0.3067375886524823
-0.3067375886524823 x 100 = -30.67%