-90.5% is the change from 579 to 55
Calculation steps:
[( 55 - 579 ) ÷ 579] x 100 = -90.5%
Formula
Percentage change = [(55 - 579) / 579] x 100
Subtract the new number by the original number
55 - 579 = -524
-524 ÷ 579 = -0.9050086355785838
-0.9050086355785838 x 100 = -90.5%