-20.5% is the change from 717 to 570
Calculation steps:
[( 570 - 717 ) ÷ 717] x 100 = -20.5%
Formula
Percentage change = [(570 - 717) / 717] x 100
Subtract the new number by the original number
570 - 717 = -147
-147 ÷ 717 = -0.20502092050209206
-0.20502092050209206 x 100 = -20.5%