-15.05% is the change from 671 to 570
Calculation steps:
[( 570 - 671 ) ÷ 671] x 100 = -15.05%
Formula
Percentage change = [(570 - 671) / 671] x 100
Subtract the new number by the original number
570 - 671 = -101
-101 ÷ 671 = -0.15052160953800298
-0.15052160953800298 x 100 = -15.05%