-87.91% is the change from 579 to 70
Calculation steps:
[( 70 - 579 ) ÷ 579] x 100 = -87.91%
Formula
Percentage change = [(70 - 579) / 579] x 100
Subtract the new number by the original number
70 - 579 = -509
-509 ÷ 579 = -0.8791018998272885
-0.8791018998272885 x 100 = -87.91%