-91.54% is the change from 579 to 49
Calculation steps:
[( 49 - 579 ) ÷ 579] x 100 = -91.54%
Formula
Percentage change = [(49 - 579) / 579] x 100
Subtract the new number by the original number
49 - 579 = -530
-530 ÷ 579 = -0.9153713298791019
-0.9153713298791019 x 100 = -91.54%