-91.36% is the change from 579 to 50
Calculation steps:
[( 50 - 579 ) ÷ 579] x 100 = -91.36%
Formula
Percentage change = [(50 - 579) / 579] x 100
Subtract the new number by the original number
50 - 579 = -529
-529 ÷ 579 = -0.9136442141623489
-0.9136442141623489 x 100 = -91.36%