-91.51% is the change from 577 to 49
Calculation steps:
[( 49 - 577 ) ÷ 577] x 100 = -91.51%
Formula
Percentage change = [(49 - 577) / 577] x 100
Subtract the new number by the original number
49 - 577 = -528
-528 ÷ 577 = -0.9150779896013865
-0.9150779896013865 x 100 = -91.51%